Malicious PDF — malware analysis report

Static analysis result for SHA-256 042fb2dde9e1bd64…

MALICIOUS

PDF

41.8 KB Created: 2020-07-27 02:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f5eece958ab769713ca9be6c517006 SHA-1: f10e4e81dbeb0e605b49f461feb0cbfc9e23b295 SHA-256: 042fb2dde9e1bd647b8365bb34bbd63f4ea12dca47b4729f16962c6536040534
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, designed to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate malicious intent.

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/pify?keyword=descendants+2+imdb+parents+guide
    • http://files.love1040.com/uploads/1/3/1/4/131406600/pitobesabul.pdf
    • http://files.groovemachine2012.com/uploads/1/3/1/1/131164250/welujebodenagik-xajazet-bivukafi-latusosamatu.pdf
    • http://files.lulingicehousepottery.com/uploads/1/3/1/6/131636914/jososexomuxa.pdf
    • http://files.nogears-nofears.com/uploads/1/3/0/7/130775366/f7d3b.pdf
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/80866554712.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/30993478259.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/33263650965.pdf
    • https://cdn.shopify.com/s/files/1/0429/4017/0406/files/sokid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/84717602462.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/kuwobozugopabuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/52152188764.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/tejaruvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/78755402629.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/96571974746.pdf
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/wutazolokoxujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/jadolixipafakafisigiremag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/37730387765.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/sitewajepenuwonuguwukile.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_off00006549.bin
96005782b74d8b6c659d8dd9336666a060ef37654e4eb421180b099e8103bddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5404 bytes
font_01_sfnt_off00007786.bin
6e8bd504ebca1ddf79296e4dea6e8dddf52a5ed97558bf04ab62ee779e7b6d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 10064 bytes

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