Malicious PDF — malware analysis report

Static analysis result for SHA-256 231041d93daa3c8e…

MALICIOUS

PDF

51.1 KB Created: 2020-07-25 21:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b74bca1eab7eb1b4ba75b4212199b6 SHA-1: 910900fad1a17a9f4b50aaa2404ccc62e1fe660d SHA-256: 231041d93daa3c8e017a0afc9b99050c806f05189c8ca24c1adeb4ae3933aee2
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf. The primary malicious IOC is the URL pointing to ttraff.com, a known malicious redirector.

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=bascule+jk+pdf
    • http://files.durhamregionroofing.com/uploads/1/3/1/6/131637218/193678.pdf
    • http://files.whereintheworldiscaseykey.com/uploads/1/3/1/1/131164281/7133743.pdf
    • http://files.michaelallensalsbury.com/uploads/1/3/1/3/131379792/vezewut_dosibewid.pdf
    • http://files.braysbargainzzz.com/uploads/1/3/2/8/132814241/dunijubakosena.pdf
    • http://files.levelnegotiations.com/uploads/1/3/1/8/131871894/2893221.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/78097279321.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/25097125403.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/vopenesejofinitusifused.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/pabetafetotilab.pdf
    • https://cdn.shopify.com/s/files/1/0428/6342/7751/files/93652735387.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/bitepagudoxajagawakujasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/xisuvumoladumod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wakuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1398/files/91977713716.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9824/2214/files/86809493522.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/79366814390.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/6664408459.pdf
    • https://cdn.shopify.com/s/files/1/0432/7810/6779/files/17953626616.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76106621034.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_off000084eb.bin
7f7da31a8549b210942790619eb5babd5cfb4e895ac8064a976cbc16f14cb53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 4780 bytes
font_01_sfnt_off00009544.bin
c961039d7da3b931b07357ccf4384d28c7b3fa5501baa9b13868ec73a5b5cba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9544 13040 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.