PDF malware analysis — malicious · c02a18441beb0c4d

MALICIOUS

PDF

41.8 KB Created: 2020-10-17 00:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: d1cf9491a25f17ac274acd74a8a5eef2 SHA-1: 634e72f613f14dc48a4462dc67b1f7f3e61124f6 SHA-256: c02a18441beb0c4d89615d48b5c3da8e0c7b664640abfb2b5e6cc575b756797e

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a "cash flow statement pdf download". The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external PDF links, suggesting a link farm used for SEO poisoning or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body itself contains obfuscated text and the malicious URL, reinforcing the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://ttraff.club/123?keyword=cash+flow+statement+pdf+download In PDF document text
- https://cdn-cms.f-static.net/uploads/4368223/normal_5f87b5a87ea02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368224/normal_5f89aec76636d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365639/normal_5f871a8e3f9b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a0c19bdb59.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366340/normal_5f8989bf5eeb2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369912/normal_5f8a0ae2438b9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369183/normal_5f8a0c1d338dc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371799/normal_5f896309dc923.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374362/normal_5f89125a89480.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365539/normal_5f8819f617efd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372721/normal_5f89c2861d534.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374373/normal_5f8983aed8484.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366646/normal_5f8a0ad4a5aeb.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/6658/4988/files/64720100114.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/9741/8645/files/white_wolf_book_of_nod.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/4649/2565/files/21188382057.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/5843/7530/files/79808440236.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1564da6-8fa0-47c0-a8e7-54ff1d0c8b30/dulesuxuwabip.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9175124f-402e-4320-9ffc-bf465c2ec0d9/pack_roms_neo_geo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/42470cb5-d74d-4680-8e2d-771eca9b817f/zuzezetozifawidepexum.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0438/5538/0630/files/filarafugij.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/5059/7528/files/rosario_a_maria_auxiliadora.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3848/2332/files/zinonise.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5244/9435/files/juror.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/1428/3686/files/lesson_1_terminating_and_repeating_decimals_answers.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006623.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6623	5184 bytes
SHA-256: `e2e190e6fc712b0c6d8a18ad35078b2a925589deff911e50e6ab6325763ebe83`
`font_01_sfnt_off000077b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x77B3	9956 bytes
SHA-256: `b67008ab1b22abcaa5fd596b8e74bbe2063a80a303311594d6f541415b95f520`

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