Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe74fcee724ad2c1…

MALICIOUS

PDF

32.1 KB Created: 2020-08-28 09:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63cf5cf347e6cee8f9ce00b202a074b SHA-1: 8c4cec37e635ff8a379c397a2dd7181e75c0378b SHA-256: fe74fcee724ad2c1124c4213a5dfe3b7a02ac56981c852d4c97dd59d276ff22b
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a 'Shadowrun 4e arsenal pdf'. The document body is heavily obfuscated but contains the same lure text and URLs. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness.

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=shadowrun+4e+arsenal+pdf
    • http://files.k9securityireland.com/uploads/1/3/0/7/130740596/lunepagelugamuvu.pdf
    • http://jozom.thistleandlaceevents.com/uploads/1/3/0/7/130776031/c4551190284.pdf
    • http://files.educationcenterthailand.com/uploads/1/3/0/7/130775563/tewokinajemipoponu.pdf
    • http://wejoned.skyhighservices.com/uploads/1/3/0/8/130814328/bekenazifobuwuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6278/files/biomorphic_structures.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/hey_jude_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/fusirazukuzalifajasuxew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/bepatujuzojaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/binenuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/momezazaman.pdf
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/78689129908.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_off000041bb.bin
1ce87c71a4472fb25b8dc448bc45d6348a216a64ebd45a9b327c89b931721597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41BB 5412 bytes
font_01_sfnt_off0000542a.bin
e332954df963d3b14fdb6d6fef255f6636e6656d8d659ed3d5d049677e0eaa0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542A 9356 bytes

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