PDF malware analysis — malicious · a0699ed9307338dc

MALICIOUS

PDF

50.1 KB Created: 2020-10-16 01:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 8f359969e510dae2b054021c8556ca3c SHA-1: e6fcf4422ab40a5706498ff112c6051a5e693197 SHA-256: a0699ed9307338dc03f7e73330ed3b1cfc043632e0b2dcdce66307525802b609

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many pointing to disposable domains, a tactic often used for SEO manipulation or to host malicious redirects. One critical heuristic identified a link to known malicious redirector infrastructure, and an ML classifier strongly flagged the PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ggtraff.ru/123?keyword=commerce+notes+download+pdf In PDF document text
- https://site-1043408.mozfiles.com/files/1043408/17198922584.pdfIn PDF document text
- https://site-1043200.mozfiles.com/files/1043200/93681172831.pdfIn PDF document text
- https://site-1042547.mozfiles.com/files/1042547/healthy_food_guide_australia_instagram.pdfIn PDF document text
- https://site-1042020.mozfiles.com/files/1042020/zirifagisigajogaxuruxe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367665/normal_5f87662827984.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366389/normal_5f87fbd4cb2fe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371258/normal_5f885619b6566.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365601/normal_5f87b150b78f3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366306/normal_5f8734aa27d0d.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/0ee11d9d1e6ecd.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dekegu.pdfIn PDF document text
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/xuxomoloxub.pdfIn PDF document text
- https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/bobov_subuf_bamapawunuj.pdfIn PDF document text
- https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5928710.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371787/normal_5f88d18db0bf1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366308/normal_5f871638d606e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366377/normal_5f88d199bb870.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369665/normal_5f88c861d5388.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://uploads.strikinglycdn.com/files/d2906e6e-e053-4f5b-8f49-e2331ed7a588/33771508993.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/93d2a2c5-e7e3-4f8c-88a5-e567843ac419/19793264781.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/86cbc597-95c4-409f-b045-0030fbdd1c97/67414470725.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb5e2895-5ea6-4234-866d-97ea041be0aa/78385392622.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4660/8282/files/zagg_keyboard_instruction_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4324/9576/files/mupupaxaxezifixasiret.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/5803/6373/files/49833821034.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5055/5799/files/fallen_in_love_lauren_kate_free_download.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000076ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76CA	5296 bytes
SHA-256: `44466553064832dcbf5ec94b2017f8e4c4b983d791ffc63e328ede70cb0ae706`
`font_01_sfnt_off000088c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88C3	10128 bytes
SHA-256: `aace31ef918a425b81a1d898e9a70816b3fc1adb35cf3a75d235a0edd6b2d0f2`
`font_02_sfnt_off0000abc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xABC4	3728 bytes
SHA-256: `aa9a402babf07e940031d13bc6b251bf900bd346a63baed59c20806a0284c5ed`

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