Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f50a8cde340b7a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-06 05:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a622cfcc002accadfa20f145d967a9d6 SHA-1: 9b992788a5bbaed3d5d3779afc5c843a11d2c88f SHA-256: 78f50a8cde340b7a4ef98f5c9527bd7275e7153adef7fa6f24a734e0a01895ac
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=sdlc+waterfall+methodology+pdf'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, with one pointing to a Shopify domain. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to lure users to malicious infrastructure.

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=sdlc+waterfall+methodology+pdf
    • http://files.citysidelocksmith.com/uploads/1/3/0/7/130776182/mijatowewizajubeto.pdf
    • http://files.amargmedia.com/uploads/1/3/2/6/132680962/5231769.pdf
    • http://bijilafi.tonystockmansart.com/uploads/1/3/1/4/131438137/6760532.pdf
    • http://files.bargenorthcompany.com/uploads/1/3/1/1/131163733/39d58b6b186e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/25604502816.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/vivosudejemezovotifazopar.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/pikopamekuxopokoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/creative_zen_mp3_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/japedurabif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/paladin_5e_oathbreaker.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/76447670325.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/58984397416.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/p_diddy_net_worth_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/gepapobog.pdf
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/10441771027.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/types_of_biomes_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006844.bin
a5d767d12f4cf59e824f6fe1cc10934cadb6fca79dd77f5f34327a8d92d3a514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5324 bytes
font_01_sfnt_off00007a79.bin
8511061d3d2398e6b0c2070d23f4a201b3c890f9e8ca265ac4b4fb4fd11e882e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 9972 bytes
font_02_sfnt_off00009c94.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C94 4324 bytes

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