PDF malware analysis — malicious · 7091217511543447

MALICIOUS

PDF

49.7 KB Created: 2020-10-28 18:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: ec31047eaf5b7522d8d72316cca146bd SHA-1: 52c264d2665c2df167a91bd5c52a4baa81d6ee1c SHA-256: 70912175115434476d4a0bcbf1fe3e65e1d9c90bee441a2b040a65c263aef3db

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with a significant portion pointing to a known malicious redirector and a link farm hosted on disposable infrastructure. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to potentially harmful external sites, likely for phishing or malware delivery.

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.
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://ttraff.club/pify?keyword=sorcerer+revised+pdf In PDF document text
- https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/fb92c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367017/normal_5f8d750bdef03.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414169/normal_5f989571450b8.pdfIn PDF document text
- https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/47292360a0.pdfIn PDF document text
- https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/sakup.pdfIn PDF document text
- https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/009f6df5f7df7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367903/normal_5f9472aa7a0fe.pdfIn PDF document text
- https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/602576.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365653/normal_5f8737c68196a.pdfIn PDF document text
- https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/firef.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369142/normal_5f957b185f4dd.pdfIn PDF document text
- https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/kinojupebul-fofedonabilu-tudaj.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/6ffd1114-07eb-4cef-899c-0aa4256ef7cf/75688719813.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/8357/2409/files/minnie_mouse_cookies_red_and_black.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f1c8548-9767-404e-b175-b957a781341c/health_psychology_a_textbook.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/0915/8563/files/neopets_food_club_discord.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/7582/2278/files/84532870617.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a57d2d16-64b3-4512-bdbd-7f1b2a14e0f9/47761897423.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006fc2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FC2	5068 bytes
SHA-256: `e930155a7a0eb88d2faaa3156942e16182ed959ac3ddc882abfaf00f38f894f3`
`font_01_sfnt_off0000811d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x811D	10388 bytes
SHA-256: `b57024caf7d04248e57f1c8e708c3546f60df838d7c7e04e4fb46b077db682fc`
`font_02_sfnt_off0000a49b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA49B	16068 bytes
SHA-256: `b1615e29a4fe6c7320d553a30418b4fece26933a192be804fa4a6c1955e67a67`

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