Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c3e93d80db8ef0…

MALICIOUS

PDF

42.4 KB Created: 2020-08-06 10:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec61b12be5fbef915eef158d519929fb SHA-1: 8da062fa6ad8f3bae33018cf29b933ff71521e3c SHA-256: 63c3e93d80db8ef0e040add34bedecd6a9acbdf36d20d4edc4ccb4feb473ad93
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=hematology+ebook+pdf', is identified as a malicious redirector. The document body also contains this URL and numerous other Shopify links, suggesting a link farm designed to obscure the malicious destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or scam campaign.

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=hematology+ebook+pdf
    • http://files.overthewire.co/uploads/1/3/1/4/131437532/2819802.pdf
    • http://files.alfatihainstitute.com/uploads/1/3/1/3/131383553/bf59b5909433c.pdf
    • http://files.mindfulvisionaries.com/uploads/1/3/1/1/131163834/tujopufuzi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/39332328585.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/bujamijosagepewes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/vubikasekipolumutafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/fish_nutrition_in_aquaculture.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/confederacy_of_dunces_summary.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3310/files/belufokasemab.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/tipimapafeguj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/40372055706.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_off000067c5.bin
07d74e20a40307f988194a1db26f974d909ff64b6a996a1435a989c4accb6c16
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5356 bytes
font_01_sfnt_off000079f2.bin
9239427f06aa102702b2719499396f3876ada9393f542e8517d8df342c9ca990
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F2 10232 bytes