Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c669225f31f3143…

MALICIOUS

PDF

57.9 KB Created: 2020-08-31 17:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 487df59ccc9cc1f7306f655e67ad75ba SHA-1: fc85d8908d08d79dfb7dabcb75a6568f01d03c33 SHA-256: 0c669225f31f3143e8300e981f1c0319087de1daf7979e42faeb61d5005d1b5f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to distribute further malicious content or phishing pages. The document body itself is heavily obfuscated and contains the malicious URL, indicating an attempt to disguise its true purpose.

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/wix?keyword=java+netbeans++for+windows+8
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0464/0725/4171/files/morulilamunumegiwosuruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3210/1543/files/fimuwuxujomuruwupovotas.pdf
    • https://cdn.shopify.com/s/files/1/0436/7846/6201/files/70770346380.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/pdf_to_svg_convert.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/busutokeritow.pdf
    • https://static.usrfiles.com/ugd/9dda13_fd7b02cecb10479c8e4941bd711c021e.pdf
    • https://static.usrfiles.com/ugd/a86d68_55472340531a426a889a45041d581f67.pdf
    • https://static.usrfiles.com/ugd/6cf392_23976379e26447978aed1a742ed6e440.pdf
    • https://static.usrfiles.com/ugd/1decf9_c11621a24456481fabcc19c7a0615f57.pdf
    • https://static.usrfiles.com/ugd/b8c837_e09e6bdd62d4495cab30ac10ada34445.pdf
    • https://cdn.shopify.com/s/files/1/0470/9387/4846/files/informed_consent_form_clinical_trials_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/zarchiver_pro_apkpure.pdf
    • https://static.usrfiles.com/ugd/c63dba_50d2ff7c378e4a639f0d5a5d413d9b2f.pdf
    • https://static.usrfiles.com/ugd/87a178_f87e2ab6460d498ab582ce49ba407e6b.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_off00009bee.bin
ac29547ec3958775de2ec8e310e96508ca727a17ad282a92ebd01dfeb92b02fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEE 5344 bytes
font_01_sfnt_off0000ae43.bin
4633280204da2749b17b6e33fbceb9bba5ec7a4ade3c0e4d653bf6e38b5e16f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE43 14132 bytes