Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d6bcc6ad483be4…

MALICIOUS

PDF

39.1 KB Created: 2020-08-24 20:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d86c4fe2b5cc0a740832060e35c8122 SHA-1: f16903f58eabf37f8449f4da3ca81208c2391f34 SHA-256: b9d6bcc6ad483be49a59a99fa9411751d0ef8d6a18f68770966a6981765a6011
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. This suggests the document is part of a link farm designed to obscure the ultimate malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and the link farm structure indicate a probable phishing or malware delivery 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.ru/pify?keyword=geographic+information+systems+jobs+near+me
    • http://bivijile.msmorales-chemistry411.com/uploads/1/3/1/1/131163729/5008513.pdf
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdf
    • http://files.cachevalleylandscaping.com/uploads/1/3/0/7/130775727/tegewolitizew-xojezuxikokadap-tukodidulirilo.pdf
    • http://suwifelif.bikerstoreuk.com/uploads/1/3/1/3/131380404/tatupunobifu-vewela-degigegud.pdf
    • http://files.nicolettabella.com/uploads/1/3/2/6/132681464/4718648.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/xonateruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/86501652454.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2147/files/democratic_centralism.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/dulajewowafegetudozaxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/blue_prism_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/44376310722.pdf
    • https://cdn.shopify.com/s/files/1/0432/1889/5010/files/life_of_samuel_johnson_by_james_boswell.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/renipapawesixizoniliroxon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2261/files/spiderman_3_ppsspp_apk.pdf
    • https://cdn.shopify.com/s/files/1/0465/9645/6613/files/android_box_malaysia_apk.pdf
    • https://www.cancer.gov/coronavirus
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005833.bin
9be6f87e02b83fe140882bc392a69daad5abc72b63517974ef0f2abe9ad91030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5833 5748 bytes
font_01_sfnt_off00006ba4.bin
78d1efd5062925f75fbdad5453350cb04adc018ba98cb9d12bd59e2050d91f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 10524 bytes

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