Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff38bbd67c9c193…

MALICIOUS

PDF

48.4 KB Created: 2020-08-08 13:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 423af4ea5559309add4e9227d9061768 SHA-1: 1001ab5919c523142f1b892bc61bf4e6d1fd7a81 SHA-256: 7ff38bbd67c9c193d6911f1cf5a76f1fe3676d27a94edc16bc6d346197444178
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of the primary links, 'https://ttraff.cc/pify?keyword=%25D0%25B1%25D1%2580%25D0%25B0%25D1%2582%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE%25D1%2582%25D0%25BE+%25D0%25BD%25D0%25B0+%25D1%2587%25D0%25B5%25D1%2580%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BA%25D0%25B8%25D0%25BD%25D0%25B6%25D0%25B0%25D0%25BB+%25D0%25BA%25D0%25BD%25D0%25B8%25D0%25B3%25D0%25B0+9+pdf', points to known malicious redirector infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or redirection scheme. No scripts were extracted from this sample.

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=%25D0%25B1%25D1%2580%25D0%25B0%25D1%2582%25D1%2581%25D1%2582%25D0%25B2%25D0%25BE%25D1%2582%25D0%25BE+%25D0%25BD%25D0%25B0+%25D1%2587%25D0%25B5%25D1%2580%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25BA%25D0%25B8%25D0%25BD%25D0%25B6%25D0%25B0%25D0%25BB+%25D0%25BA%25D0%25BD%25D0%25B8%25D0%25B3%25D0%25B0+9+pdf
    • http://files.torresprofessionalcleaners.com/uploads/1/3/1/4/131453897/sefawunijusudawip.pdf
    • http://files.joshjchoi.com/uploads/1/3/1/4/131437276/6070165.pdf
    • http://files.belleviewhighschoolafjrotc.com/uploads/1/3/1/4/131453062/bbbf95d5863e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/remumapakafurexemime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/does_hypixel_have_a_pe_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7974/files/86086417531.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/63762815430.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/3523846104.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/40515071143.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/93094596221.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/abbyy_transformer_2._0_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/35779618940.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/31596309370.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/ryobi_18v_trimmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/wevujaxasafesonogilowev.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/13514225446.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/nosudapakopolejigufolewo.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_off000061c9.bin
9be8457c440812cd375ffa58ba6c15b2ace7620ba5fb33302d456cb15e0a6ba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5556 bytes
font_01_sfnt_off00007468.bin
9d8d2843e15bd7596edd0d612857ee60d7e9385f46d3563f8862040c0247fff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 15116 bytes
font_02_sfnt_off0000a308.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA308 4324 bytes

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