Malicious PDF — malware analysis report

Static analysis result for SHA-256 929dd3a481217962…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 13:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2735709c04e55b034d19664b24ac7980 SHA-1: d68f89a0b89b39a5a556cee5aedd35b0839a126f SHA-256: 929dd3a481217962cd60353234ce7fa283b625929892572b0936b503c153a6ec
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=barcode+generator+pdf+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'https://cdn.shopify.com/s/files/1/0430/7920/5013/files/vavojojotegox.pdf'. The document body, though heavily corrupted, contains fragments suggesting a lure related to 'barcode generator pdf free'. The ML classifier strongly flagged this PDF as malicious.

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=barcode+generator+pdf+free
    • http://files.halfacrestudios.co.uk/uploads/1/3/1/3/131383924/5693121.pdf
    • http://files.wildlifepestsolutions.com/uploads/1/3/1/3/131384175/99c5058eac8.pdf
    • http://files.ttautothunderbay.com/uploads/1/3/1/3/131378771/pemerazeragoza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/vavojojotegox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/tapuvone.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/94183317059.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7714/files/7122072251.pdf
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/baixar_catalogo_eudora.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/xeguras.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/20775655801.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/30473668735.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/jumufunabozatilewafisab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/riscos_psicossociais_no_trabalho.pdf
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/joseph_king_of_dreams_full_movie_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0437/2729/0518/files/tlcharger_apprendre_le_franais_gratuitement.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_off00005f36.bin
74bc8c363568a8f34f820fbd22641d82788a94f170de2121fb782cc1b73ea5e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F36 5160 bytes
font_01_sfnt_off000070d0.bin
5831648ff33901e32c33f57ddae288fb78bb57406cd9e1d30abf54c85b7f7646
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 9968 bytes