Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80e44cc7df743c9…

MALICIOUS

PDF

36.2 KB Created: 2020-08-05 12:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4918d73455d9015105a53211229c2b0 SHA-1: ff03db5ebf484c09b43dcae20e8b008ce0e0a22c SHA-256: e80e44cc7df743c9f5b251806803b2aa477abb60326b243f194ddda97ba68640
152 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=energy+environment+ecology+and+society+book+pdf'. This URL is embedded within the document body, suggesting an attempt to lure the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=energy+environment+ecology+and+society+book+pdf
    • http://files.slaglesfamilyfarm.com/uploads/1/3/0/8/130873903/6479036.pdf
    • http://files.4seasonsathletics.com/uploads/1/3/0/7/130739742/074852330ea10a3.pdf
    • http://files.aboundinlove.com/uploads/1/3/0/7/130776730/titom-fapuxixeziped-gimobanuwoxe-godusevigigabag.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/40681997131.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/centurylink_compatible_modems.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zumimulapowekulusevenire.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/27220471529.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/73159671361.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/91226376799.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/zowawiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/betel_nut_is_bad_magic_for_airplanes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9224/files/gesiwopajatetovof.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/sigof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/73890550935.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/migemigob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.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_off00004d28.bin
c2fb9d7d405ba5b06874a2aab564f5877148614c40789977210d037f334119d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D28 5800 bytes
font_01_sfnt_off000060e5.bin
faf9ce650b41a8e5cf70a541f29b63ca6c43af1395b9600108f0f0fdf5d66332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 10180 bytes

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