Malicious PDF — malware analysis report

Static analysis result for SHA-256 6396ca306c3ef918…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 10:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983baa1c388fe24be1a0d77e063a8241 SHA-1: 602543b6b22fd8fc14c84c9d71c5252dba56d23d SHA-256: 6396ca306c3ef9180fedea786f22940fefb4910e555ecdf98a5ca59568765057
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to academic citations. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports a phishing or scam attack pattern.

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=apa+citation+book+chapter+pdf
    • http://files.murthlenesampson.org/uploads/1/3/2/6/132681969/c751f2061ac1800.pdf
    • http://files.3d-printer.com/uploads/1/3/1/4/131409709/navenorimoruboz.pdf
    • http://files.babcockranchdragonboatfestival.com/uploads/1/3/0/7/130774990/411969.pdf
    • http://files.homeartscontentandcopywriting.com/uploads/1/3/1/8/131858540/vebibuwugodow.pdf
    • http://files.morpethpantomimesociety.com/uploads/1/3/0/7/130739155/sosemenaxebupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7325/5062/files/lizolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/41577591477.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/69845186450.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/59688707713.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/62634078635.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/wiraxis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/1603106039.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/70417193487.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/zakegilafodinet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/25944702939.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/93307633637.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/vomepipel.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c1.bin
5bb15409683e8dc2ee98656a86c2310d77ae1185b50d5bed7ff268531fd37cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 5012 bytes
font_01_sfnt_off000088ad.bin
65b8667d55212b46411f6ee132a1c13c4ddb3748eb4c6b540b308580c0432d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 10112 bytes

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