Malicious PDF — malware analysis report

Static analysis result for SHA-256 6450f145b7a99c0d…

MALICIOUS

PDF

48.6 KB Created: 2020-07-20 10:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f2b839203e6a0ea348109235632aa54 SHA-1: 0bd870988426194dc5a59c788c87569fc72c875a SHA-256: 6450f145b7a99c0d5aba8c31ab027205a802b2ec59c05ee6624e1f487499ca6b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to redirect users to malicious infrastructure. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely intended to deliver a payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

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=wpsapp+pro+apk+2020
    • http://files.chemisme.com/uploads/1/3/1/3/131381021/laduz.pdf
    • http://files.highdene.com/uploads/1/3/1/4/131453818/lusezuvexudebo_ronalaz.pdf
    • http://files.topcatswing.com/uploads/1/3/1/4/131483154/doxabugoj.pdf
    • http://files.worksafehsesolutions.com/uploads/1/3/1/4/131409621/budiwepidanoso-mivifaru-valiba.pdf
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/keguripexefonibovilalep.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/bimetivos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/pojeladapemolekevex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nijudesiko.pdf
    • https://cdn.shopify.com/s/files/1/0436/4995/8046/files/15364917988.pdf
    • https://kisebiguso.files.wordpress.com/2020/06/febivotutawabawo.pdf
    • https://papagezoxez34556887.files.wordpress.com/2020/07/20218421351.pdf
    • https://xuxadazowuz.files.wordpress.com/2020/07/jitojak.pdf
    • https://lukipidize.files.wordpress.com/2020/06/10738092908.pdf
    • https://nezirirotur.files.wordpress.com/2020/07/wibokujevuragiruretapozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/wutegazadujewuzegevituwo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/jefenugakazozofikop.pdf
    • https://cdn.shopify.com/s/files/1/0437/1477/3147/files/mufibusamojebuwal.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/rujafazokuvujinuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/zesefolowixajemotijejuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/94495658137.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/kezotesiteribinizexewo.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_off00007c07.bin
32c75dd1186de9f29777fe6af5439d516ecf97cfeb825c1b2534d42f1650dec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C07 4568 bytes
font_01_sfnt_off00008b91.bin
9630c3fe268312749628bb342c0aa69eef9594ee5c34f8ed853655902cab7692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B91 12944 bytes

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