Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fda210abc288e1e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 00:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c151387c2aa009ac2679c2e0d2b933f SHA-1: 7c3badd11f376af973ae1dde61177a70485be8e0 SHA-256: 9fda210abc288e1ee63aacfb93c34f32e396ef99f87341055ec537aa91b14c1f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier and contains a link to a known malicious redirector at https://ttraff.com/pify?keyword=lisp+autocad++area. The document also functions as a link farm, embedding numerous links to other PDF files hosted on Shopify, likely to manipulate search engine results and distribute malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy indicates a phishing or malware distribution attempt.

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=lisp+autocad++area
    • http://zugapojaj.judithrpetersonphotography.com/uploads/1/3/0/7/130775422/2d477576444150.pdf
    • http://fevupabi.bellmereonrichards.com/uploads/1/3/1/3/131383309/fevekixej.pdf
    • http://nanaw.askmarct.com/uploads/1/3/1/4/131452938/tivezog_jenow_werirezoxenakev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4868/1120/files/14241612884.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/tukenupepiresejuxajerepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/menuwewupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4958/1724/files/83783045719.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/deploy_to_heroku_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/sajuvum.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/12408607158.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/31670309272.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/27551409828.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/xupevopexidir.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/31977568341.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_off0000616d.bin
816850b7f91f1a8ec9232d09f1b95a6074e6dc01dffd6c3cd60ba2d2d394b120
pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 4976 bytes
font_01_sfnt_off0000725d.bin
2758f6744b0501aeaacb1a3a6f4e83586e17f29766700d3c756117a0cf6692a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 15924 bytes