Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be978e3199a3b7b…

MALICIOUS

PDF

38.7 KB Created: 2020-08-20 19:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c19628bd3a1be7bd3a6ee5d1d76a7c7e SHA-1: 6ad758e8ac2e48328b937d8822705990b21f675b SHA-256: 0be978e3199a3b7b788e475b71feb976ce1ae6ff5aeaf1f20630e55ab7d3b3e8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a seemingly innocuous keyword. The document also hosts a large number of external PDF links, many of which point to benign Shopify domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect the user to harmful content.

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.ru/pify?keyword=baby+one+more+time+song+free
    • http://files.sunnytreehouse.com/uploads/1/3/1/3/131379530/49b79dbe7f6.pdf
    • http://jenasej.phantom-quartz.com/uploads/1/3/0/8/130873710/rufodixujan.pdf
    • http://files.justanotherflutist.com/uploads/1/3/0/7/130738513/dinowigarifexarered.pdf
    • http://zuzivep.ocsocialskillsinstitute.com/uploads/1/3/2/7/132740961/subugipugabexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/67530807742.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/tazosetutiruliw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/5th_grade_math_place_value_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/96377754345.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4634/files/livre_pour_apprendre_le_franais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/vigadinenedasabiboxuguf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/anatomy_and_physiology_applied_to_obstetrics.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_off00005912.bin
fbc556e2b766ed982cc2477805950424a10ef9d5570cdd57d1b2a138d39fe13c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5912 5348 bytes
font_01_sfnt_off00006b30.bin
02a15360556e07fd328a915db285b7ca345e6a1a459686640ab742ffd788f2aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B30 10512 bytes