Malicious PDF — malware analysis report

Static analysis result for SHA-256 7858ec13683c6f30…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 00:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31ffc123a7499a41b6fc4254b3b83a3 SHA-1: 9b911bbd05eb77751c38533a0ded64bb16a67744 SHA-256: 7858ec13683c6f3068a0d875bf0dd91918fed762cc48c78d5185303accabc19e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to external PDF files hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading potentially harmful content by disguising it as a movie. No scripts were extracted, but the presence of malicious redirectors and a link farm indicates a phishing or scam attempt.

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.cc/pify?keyword=anonymous+full+movie++dual+audio
    • http://buzan.mimiandhillshop.com/uploads/1/3/1/4/131453109/bafebepum-lisukepufakid-rinid.pdf
    • http://files.architecture3115.com/uploads/1/3/2/8/132815791/turalazewuva-jijutiwadivipe-bezifuno-sugilipakup.pdf
    • http://xutij.secureallianceps.com/uploads/1/3/1/1/131164406/72d8d691.pdf
    • http://wexoka.arkansascloggingcouncil.com/uploads/1/3/0/7/130776819/kezademex-wikuwiri.pdf
    • http://files.bchilinbeauty.com/uploads/1/3/1/0/131070872/2b3a2528c5cbc90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/41612069241.pdf
    • https://cdn.shopify.com/s/files/1/0457/0588/7900/files/75916796476.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/fatimugorabojogaxijogup.pdf
    • https://cdn.shopify.com/s/files/1/0447/1206/7228/files/potica_aristteles_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/supuninofodofifasubeja.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/software_video_facebook_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/ltaaxtyrb_2_ctpjy.pdf
    • https://cdn.shopify.com/s/files/1/0438/0862/0701/files/nojaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/black_and_decker_cordless_sheet_sander.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/company_capital_structure.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/67731484524.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f00.bin
3efe7f381e2ce89472c8f9b4e3e849388713097bf5b9432d489a0b0ec39db660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 5108 bytes
font_01_sfnt_off0000705d.bin
90fad65e502815d3663a3a9dead20b3bf66b76b9ade83f13689079bbfd6fec77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 10024 bytes

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