Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fbcecb45c1e43f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-08 17:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bc110954de91f5c21013c1109368f55 SHA-1: 32aadade416f8ec632506b79489a41de4bdf1bb9 SHA-256: 72fbcecb45c1e43f19740ffc919149470d0014c9453cc09475de2b301cdc64c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a manual for a t-shirt screen printing machine. This indicates a phishing or scam attempt designed to lead the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.com/wb?keyword=t-shirt%20screen%20printing%20machine%20manual
    • http://files.arthow-to.com/uploads/1/3/0/7/130739772/worek-maviwi-tikizitev.pdf
    • http://files.trimleystmartinprimaryschool.com/uploads/1/3/1/4/131454523/suxisisajezu-nelifinabufipo.pdf
    • http://mogoza.zodiacciphers.com/uploads/1/3/0/8/130814017/a4b4062dd8f.pdf
    • http://mitifatel.pamelaharrisonpoet.com/uploads/1/3/1/0/131071164/8317983.pdf
    • http://files.nancyandersonmarketing.com/uploads/1/3/1/0/131071145/lixukatonat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/vidajik.pdf
    • https://cdn.shopify.com/s/files/1/0440/8426/5110/files/xotuwegoroxesigisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/puxotatawafitenena.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/xixugebija.pdf
    • https://cdn.shopify.com/s/files/1/0436/7836/7897/files/watermark_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4396/files/38047062750.pdf
    • https://cdn.shopify.com/s/files/1/0445/7195/1268/files/cahier_de_charge_fonctionnel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/wetuposi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/pesisidodixuvutusiperegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/72643280517.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/personal_financial_statement_sample.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_off0000546b.bin
ba13d7b779d960933a2421807b83a39c741332ec7d2a60e2412ff56fbdfe2cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546B 5100 bytes
font_01_sfnt_off00006590.bin
fe2a70d9ec75538ac63bb1f044aa9d2bd47445c2de72adedee5780f95dc0974a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 10568 bytes
font_02_sfnt_off0000899e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 4324 bytes

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