Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c6895bd94442da…

MALICIOUS

PDF

33.1 KB Created: 2020-08-12 23:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ef48bde0c22262e7073d29a75c434f SHA-1: a7c0e24a5b75a4e979348bd822d887d4417f1714 SHA-256: a8c6895bd94442da9fcf927e6d69f1570b10eb0a11115e7bb9e710bb124d1283
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, specifically pointing to 'https://ttraff.cc/pify?keyword=benim+hocam+yks+tarih+pdf'. This link is likely intended to redirect the user to a malicious site for further exploitation or phishing. The document also exhibits characteristics of a link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0431/1308/7142/files/zokel.pdf', suggesting an attempt to obscure the final malicious destination.

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.cc/pify?keyword=benim+hocam+yks+tarih+pdf
    • http://files.theultimategaminggalaxy.com/uploads/1/3/1/4/131438680/tapifibixasimid-vudawubok-neruzi.pdf
    • http://files.miratorres.com/uploads/1/3/0/8/130874213/ninexivewo-duwaliv-raxowa.pdf
    • http://wofimo.northfourth.org/uploads/1/3/1/4/131437508/gojekixovutizibupor.pdf
    • http://zinukuba.photographybysamantha.com/uploads/1/3/1/6/131637149/reniz_vinaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/zokel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/house_rental_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/83228535742.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/dextrotartarato_de_brimonidina_bula.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/beatles_complete_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/70101660760.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/zudegari.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/jerevukimow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/19694976956.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/rogofiwesapam.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_off00004228.bin
2aadf347aed446997548fbaa843a0424aeb9864a5b4e470a8f718ce482646b42
pdf-font-stream PDF embedded font (sfnt) at offset 0x4228 5576 bytes
font_01_sfnt_off000054f0.bin
2fbafd9b872792b7b7079bb6d7a2a33c41421ae2212b5ecfa364fd1f5f4b178c
pdf-font-stream PDF embedded font (sfnt) at offset 0x54F0 10316 bytes