Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafd278308943221…

MALICIOUS

PDF

59.1 KB Created: 2020-08-10 21:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f7996d82f705782193783d813f1701 SHA-1: 43a98d86669add6a4b26a7efe6fa4621879ac8ad SHA-256: fafd278308943221fa4df076eaf36d087db424b88b9ef83270a25345cc5333be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=blendtec+lifestyles+recipe+book+pdf'. This indicates the document is designed to lure users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, further supports the link farm attack pattern. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=blendtec+lifestyles+recipe+book+pdf
    • http://files.mulvaneystudios.com/uploads/1/3/1/3/131384771/6f40f1809d95.pdf
    • http://files.stpatricksripon.com/uploads/1/3/2/6/132682627/bubogogebejug.pdf
    • http://files.overseersmasonicriders.com/uploads/1/3/0/7/130776208/depuzuzuwija.pdf
    • http://taruvini.duboispsumetz.com/uploads/1/3/2/3/132303382/tipuku.pdf
    • http://zurenijag.npnphotography.com/uploads/1/3/1/4/131407406/bazodesot_nevifagotifoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0093/files/21268431360.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/how_to_change_file_to_word_doc_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/gargantuan_size_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/juice_box_bully_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/90503559162.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/47631587026.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/jexododiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/xopifeduzofejetawowube.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/99640091517.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/69739989475.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5421/files/rawez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0714/files/free_download_built_with_science.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/89427494615.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b41.bin
118a991cb494a6a23b2f24ea6e3498295cefd2674125eb4b173bbd185b561099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B41 5084 bytes
font_01_sfnt_off0000ac95.bin
5c012bcedf60c2871cb001b99f46600774cb23b248b2c67f34e59a53ba0fb567		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC95 10656 bytes
font_02_sfnt_off0000d0f9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 4324 bytes

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