Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cce80d2adeb826…

MALICIOUS

PDF

36.8 KB Created: 2020-07-09 11:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ff4519de3cd5a17eaa068d97dd0b2a SHA-1: 3ecd7164f03ac88a64d77f62cd26b67dc5a88a52 SHA-256: 47cce80d2adeb82652731522b07ae050c7c64251f34cb7543fe7495abca9fd71
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a primary redirector and many links to external PDF files, suggesting a campaign to distribute malicious content or phish users. No scripts were extracted, but the extensive link farm points to a delivery mechanism.

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=messiaen+vingt+regards+pdf
    • http://files.withhiminheavenlyplaces.com/uploads/1/3/0/8/130814868/pofaketikirupim-memedorevog-vuvopusexa-jazikurimew.pdf
    • http://files.odoscholarship.org/uploads/1/3/0/7/130774990/e818ede.pdf
    • http://files.ay-visuals.com/uploads/1/3/2/8/132814990/6961ef.pdf
    • http://files.mydhfastmandat.com/uploads/1/3/1/4/131454501/wimatitifo.pdf
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.comforttrainer.net/uploads/1/3/2/6/132681002/4312007.pdf
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdf
    • https://jabiwowit.files.wordpress.com/2020/07/33013592798.pdf
    • https://numowikabap.files.wordpress.com/2020/06/zukilikijex.pdf
    • https://gowemobo.files.wordpress.com/2020/06/66889481806.pdf
    • https://pobagokebojo.files.wordpress.com/2020/06/84067949084.pdf
    • https://sofifetipi.files.wordpress.com/2020/06/jekilodilejexakemelizono.pdf
    • https://subezokebiw.files.wordpress.com/2020/06/zakotixadarudetol.pdf
    • https://juzuzenevide.files.wordpress.com/2020/06/48037521312.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.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_off000053a0.bin
6c265596587eedf63ad5a967305d5c5a1c59fdd56ef59f4c0e0031d2ceae664b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A0 4920 bytes
font_01_sfnt_off0000646f.bin
a376f8ae459c4aeac463e88ab644c6354a37fe2ec970c6aded59e3cc99875524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 10032 bytes

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