Malicious PDF — malware analysis report

Static analysis result for SHA-256 7270a59a5f3809c2…

MALICIOUS

PDF

40.7 KB Created: 2020-08-31 11:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad8417c78b23144e1ad438308cb161cd SHA-1: ae755e1ba61ea778326095fa364ce1815a690acb SHA-256: 7270a59a5f3809c26770e0a266c6c0862c584ebb568172b4221b7389426c284b
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified as a redirector. The document body, though heavily obfuscated, contains text suggesting a lure for 'Arrival online movie free'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to increase visibility of the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=arrival+online+movie+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/db93e9_b5f754622d7f4d8ea2f37c68ee9088d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bda96b91e62445049cbdeb2cb1c3580d.pdf
    • https://static.usrfiles.com/ugd/33ab24_8b7409d395b040f2806bc9f0b328b922.pdf
    • https://static.usrfiles.com/ugd/b8c837_c720883fa70a4b16aa28daeb13e60fa9.pdf
    • https://cdn.shopify.com/s/files/1/0460/1872/3999/files/54181941988.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/piwekuwekixerunokik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/acca_f9_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/mubavofudevapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/vomegadalepijufudak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/tepuperipegezurupovuboba.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_4b3d7b7b618a4a7b951c1c775a211bb6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6de06d3b573048e3a1efb3c1268c79d1.pdf
    • https://static.usrfiles.com/ugd/238140_85dd663de75646ef92aaefb84e8e7f88.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_off000062c0.bin
a1511172f7f032b0657898a6e501e4de70857e68c6bac99f11ebcd8c7f0cc42c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 4784 bytes
font_01_sfnt_off000072f2.bin
672f90ca962cc5c6a6e3300981fe776cf1831ad026bc42104897718c7fb7a3dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10496 bytes