Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec5c0a8ae7cc65f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 06:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbbe46c939bbc2e576c8e4978b20205f SHA-1: c87b98cb5b151a0e80eca570f9845bdf05d750bc SHA-256: 7ec5c0a8ae7cc65f6db0389e3ccf2bed8c00c97e08b05c62589cba94d952407f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text suggesting a lure for a "Zelda encyclopedia pdf download". The presence of multiple external PDF links, some hosted on potentially compromised Shopify stores, indicates an attempt to distribute further malicious content or engage in SEO spam.

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=zelda+encyclopedia+pdf+download
    • http://wuzisepen.thaideemaew.com/uploads/1/3/1/1/131164250/gusufotelujekuka.pdf
    • http://files.susanaaleixolopes.com/uploads/1/3/1/4/131453255/gususuxatupi.pdf
    • http://files.mckevlins.com/uploads/1/3/0/7/130739462/disunifu-jovukokug-motalarawax-fijipew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/bijawatowerekus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/minupimavedapafamesujobef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/fuzugomujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/32441208598.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/php_download_blob.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/98189072803.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/diwudokevapotolenuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/66901462898.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/puborokomatofoke.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/finoxixepidajaxigumumir.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/20846675548.pdf
    • https://downloadpdfone.blogspot.com/?sale=150670638X
    • 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_off00005ae6.bin
d144876fbd8fe9f5334d22b2bb146c9f354f0dd8fa979b7b01b598b4ebd35883
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 5028 bytes
font_01_sfnt_off00006c36.bin
c0997bdd415cbec5738f8d7d2eb11c0563e3dbe294981ad2345f93ef82fa2104
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C36 14972 bytes