Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c57a583f1374213…

MALICIOUS

PDF

64.1 KB Created: 2020-07-27 19:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 351b476ae0a19f4bf3908dde38a89554 SHA-1: 75cb86fd0877333375227e73fe920d9496a69558 SHA-256: 4c57a583f13742136f13b17938397d44e8ca9fc80a088c7cb4ff69e211d0d295
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, masquerading as an episode guide. The primary malicious URL identified is ttraff.com, which is flagged as a redirector. The ML classifier strongly indicates maliciousness, and the presence of numerous external links supports the link farm heuristic.

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=penny+dreadful+episode+guide+wiki
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.cjstravelconnections.com/uploads/1/3/1/3/131397927/8677927.pdf
    • http://files.italiancitizenshipconsultants.com/uploads/1/3/2/6/132681384/9214795.pdf
    • http://files.sandracohn.com/uploads/1/3/2/7/132740342/6509383.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/42756649920.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/99894910275.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/30310409537.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/tufoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/56250417628.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/lijedot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1404/5341/files/jejujosuroku.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/tisokezadope.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/xavuxakufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/tegewofaz.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_off0000bbe7.bin
4c7fad702de1b1a2cb2e8dfc60bcd4970a9678a84b3c7a91798812227ab5c1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE7 5268 bytes
font_01_sfnt_off0000cdf1.bin
a89bd3266806807eb573a805d5d33a915a4eb4cfa5c90b2bd8fd37beced40103
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 11100 bytes