Malicious PDF — malware analysis report

Static analysis result for SHA-256 6784afe540a0cafe…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 10:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f9430c8712ef0b68b2a4ef22660cf2 SHA-1: bb79813deb3dcec89507ec666fea48373a8e84b6 SHA-256: 6784afe540a0cafeb94ef897ee858870b14c07ca3b83c11dab59c3644d7923eb
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to benign Shopify URLs, but one critical link redirects to a known malicious domain, ttraff.com. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user into clicking it, likely to download a second-stage payload.

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=miss+fortune+league+of+legends+guide
    • http://files.cornerstoneferndale.org/uploads/1/3/1/1/131164047/kexigiketin-fivutuz-tozufidoju-dipunolizi.pdf
    • http://files.myshabbychicdesignsbycarla.com/uploads/1/3/2/6/132681062/575840e.pdf
    • http://files.trnsetters.com/uploads/1/3/1/3/131379680/ba5bd971f7b.pdf
    • http://files.johnjzelenski.com/uploads/1/3/2/7/132740580/mutejexadapuxodan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/burger_king_coupons_juli_2017.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/bamford_classification_of_stroke.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/gixeriterubabefigafip.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/jegefiragavegesamiwoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/susujovunanuzegasob.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/itunes_show_duplicates.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/26995780836.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_off00005f17.bin
532a05e1a55efb2689697784902363c8018fc4d2584e1216625c521ca33b4dca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5080 bytes
font_01_sfnt_off0000706c.bin
0ebbf2d66b2c3f2fee967d3ff54931366d83fa4041ce774e14006ade1ac723f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 10560 bytes