Malicious PDF — malware analysis report

Static analysis result for SHA-256 e673cc3c90b6c533…

MALICIOUS

PDF

32.9 KB Created: 2020-08-24 08:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09369d98f07963a92583dca501edac71 SHA-1: 619d47749a6236f0e74eb148cd25e245c9f33229 SHA-256: e673cc3c90b6c53312b9dd723caf6f4d1432a2c52a99610a2e69c47903009ed0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other URLs hosted on Shopify, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a harmful destination.

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=bundoran+ireland+surf+report
    • http://files.tcfallnationals.com/uploads/1/3/1/1/131164090/ramifuju.pdf
    • http://files.dralfonsomercado.com/uploads/1/3/0/7/130740051/biroselexa.pdf
    • http://files.neworleansfishingadventures.com/uploads/1/3/2/7/132710669/ruzejisurofaxoloj.pdf
    • http://files.commonwealthproaudio.com/uploads/1/3/1/1/131164124/tisebibimofozunumoge.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/important_antonyms_and_synonyms_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/valivipemobubimuxafijil.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/zegemodukuzaferalegalora.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/development_economics_debraj_ray.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/98704251567.pdf
    • https://cdn.shopify.com/s/files/1/0447/1137/9097/files/administration_of_justice_law_sri_lanka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7991/files/fcra_consumer_report_permissible_purpose.pdf
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/tijitipepageru.pdf
    • https://cdn.shopify.com/s/files/1/0449/8325/5198/files/homemade_glue.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/79141863161.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/xuzomuwamunovalo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000449d.bin
493acb13690e0395429f8d77e7faf8362231538cf0c8da5e87a387d6f63033b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x449D 5084 bytes
font_01_sfnt_off000055f1.bin
26c702c531b474208862844a9ac6e40eadfa0adda443e1fa13ca980383e10484
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F1 9692 bytes