Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abbf2c0a6255a8a…

MALICIOUS

PDF

38.3 KB Created: 2020-09-11 06:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48f781e177d4f690ec7d058ce149fd5e SHA-1: 9ceac94d5c7fb397c3ef3553dcd62686e900bb65 SHA-256: 5abbf2c0a6255a8a3679f81f57326663a4d4c223d15b2bda92237325de09cf88
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector, disguised as an instruction manual. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware. The primary malicious IOC is the redirector URL which likely serves as a gateway to a second-stage payload.

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.link/wix?keyword=netgear+arlo+pro+2+instruction+manual
    • http://xixir.crepair2u.com/uploads/1/3/0/9/130969153/6827596.pdf
    • http://maxaneji.darcyrylander.com/uploads/1/3/0/7/130776167/dccab89b083.pdf
    • http://jirovuxa.traversehotham.com.au/uploads/1/3/1/4/131407089/dodupebel_mosaxu_xamerupan_wuxup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutiga.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/69340759045.pdf
    • https://cdn.shopify.com/s/files/1/0464/6056/7704/files/washington_state_boaters_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/14_august_2019_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0465/4704/2462/files/beta_film_all_audio_song.pdf
    • https://static.usrfiles.com/ugd/4c4e45_e59c7f6924cd406c887e4d9191dc4691.pdf
    • https://static.usrfiles.com/ugd/105a8c_afb6a0118b8c47b095b433e4344b6dd6.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_030b4811155d4ae8a270942f86d57842.pdf
    • https://static.usrfiles.com/ugd/f34823_0a843430d8c34807ad640480ccd6a4c8.pdf
    • https://static.usrfiles.com/ugd/c836c3_59405d0517604fd199a7d62b4bec049c.pdf
    • https://cdn.shopify.com/s/files/1/0440/2118/6718/files/printable_math_worksheets_addition_100_problems.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/wigotavagofomulivawuvexap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1751/files/barexukitoloresugenalis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/ruzeguxokukow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/63740895313.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_off00005624.bin
95b6c9bd415bbdda62a45a9d05e67000b4bd128255cdbece00cf217904f5fb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5624 5352 bytes
font_01_sfnt_off00006853.bin
5019d9c832aab51f377f30f450eef67ed54a5014fec50c949f9f75206a424f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6853 11064 bytes

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