Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d54ec2efc12502…

MALICIOUS

PDF

42.5 KB Created: 2020-08-06 23:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a8193cbafc2c6707b330b2f51fc9cf SHA-1: d7e1471e1af85635dd5b5d88f539f0071db99338 SHA-256: c5d54ec2efc1250284892788bbdede3437dac4fb2e2901d944350d5baac362d2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous embedded URLs pointing to external resources, likely for phishing or malware delivery. The primary malicious URL identified is https://ttraff.com/pify?keyword=case+study+apa+format+pdf.

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=case+study+apa+format+pdf
    • http://files.martincamp.org/uploads/1/3/0/8/130813054/fopuxajuno_xujamol_vesumiwogaxa.pdf
    • http://files.ernst-arch.com/uploads/1/3/1/3/131398022/vukeri.pdf
    • http://files.honoraryislander.com/uploads/1/3/1/8/131871569/8607927.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/domiwopabufuwinoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/34798139528.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/mammoth_mountain_10_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/mumolutazar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/45887277468.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/cultivo_y_crecimiento_bacteriano.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/88370463138.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5813/files/nemuxevoteloxesazakewevur.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/20114816708.pdf
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/52071354145.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6975/files/al_quran_terjemahan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/80910499798.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_off00006973.bin
d0cffb64744c1b230b133f274b04ac85c73c1b1085772205ced03f89d00e67ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 5160 bytes
font_01_sfnt_off00007af2.bin
4d190efba60318937fc57a1b80f0fcb783681d4e2c1998a5c026511b70a9c341
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10140 bytes