Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba94a7e0e55105c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-17 01:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc87f724e03a707ec676ddf8352ebee SHA-1: 86f3da3e5d74c36e7e7b4ef2ca571e813be0a135 SHA-256: 6ba94a7e0e55105c087340d3f5a5596cbbe8d3413966405ed8c04e206842e3d2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body text, though partially corrupted, includes a reference to 'Consumer reports air purifier molekule' and a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector suggests an attempt to deliver a secondary payload or lead the user to a phishing site.

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=consumer+reports+air+purifier+molekule
    • http://mafapol.butterflybondage.com/uploads/1/3/1/4/131483200/7850687.pdf
    • http://gewezemu.cprlifesupport.com/uploads/1/3/0/7/130738531/2389918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/xufapivuwudupik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/amigurumi_doll_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/zivakijejuvegosaja.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5873/files/26419527636.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/bokojarazalef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/28679382115.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/veronica_roth_free_four.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/16687134743.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/dukutusamolegufafow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/adobe_flash_player_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/tales_of_phantasia_rom.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_off0000678b.bin
8d06cfefb08766b4846703a9bc57152dc1d2bb967cfccbe2b9f458febbdced70
pdf-font-stream PDF embedded font (sfnt) at offset 0x678B 5016 bytes
font_01_sfnt_off0000787b.bin
ff727f6d8c6408ac12f26a5b604d652146ff0dd2ed2c390fde0cfcfc61857721
pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 10220 bytes