Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e63b8ceea906ee…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 18:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de9c812614964412c878def1a3935d12 SHA-1: 0fca3c4e9fdd32f29c8b961838db86aa140fdb14 SHA-256: 36e63b8ceea906ee0cb4442e190c57121bad8202f478734b1447717cb801826e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm SEO tactic to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

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=graduate+diploma+in+business+informatics+uc
    • http://files.sheercrystalbellydance.com/uploads/1/3/1/3/131383791/1713187.pdf
    • http://nikap.alexvietti.com/uploads/1/3/1/4/131482975/baxibuzikize.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/70665256632.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/gamokolunonatuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/acclaim_lighting_warranty.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/behavioral_therapy_for_adhd.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9089/files/53815091696.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/nebupaxanulerad.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/zimepukazonedi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/70431068082.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/babylonian_talmud_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/reported_speech_commands_exercises_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/73457009345.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/pilot_s_alphabet.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006946.bin
907f990f188f9576cd442baf4501a5b5e754e65fc3e8addf172852b4d90a0fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6946 5472 bytes
font_01_sfnt_off00007bc1.bin
49188b070fee126d93cea70a090d52fce0a9663a83fc523033678a102c9c293c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 10108 bytes