Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec8b8cb20b97724…

MALICIOUS

PDF

35.6 KB Created: 2020-08-25 18:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e95b611604a248ff2e8af0142b971d3 SHA-1: 0e23539e6ccf918462d38c0d1e94683ce09bbd01 SHA-256: 3ec8b8cb20b9772436e1e0eac2f2f85b809cb6e574b7442d697674d6b260c112
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. Another critical heuristic identified it as a PDF link farm, with many links pointing to Shopify domains, likely to obscure the malicious intent. The ML classifier strongly indicated maliciousness. The document body text, though partially corrupted, contains the phrase 'Fringe 1. sezon indir' which aligns with the malicious redirector's keyword parameter, suggesting a lure for potentially pirated content.

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=fringe+1.+sezon+indir
    • http://files.thetruthstandsforever.com/uploads/1/3/0/8/130815437/vubapatemumojuva.pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • http://wutavabad.traderiverefc.org/uploads/1/3/0/7/130739059/lejisonilato.pdf
    • http://files.essenceofbeautydublin.com/uploads/1/3/1/6/131637057/9362341.pdf
    • http://files.spechicago.org/uploads/1/3/0/7/130775727/veduwemegowewimok.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/guzojixepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/59740686338.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/nuwofixekadamepaponerarud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/fufifedujigefanugulevebod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5741/3270/files/80784670627.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3050/files/jipuketewajupomunekaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/wepopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/circular_motion_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0432/7886/0454/files/95416795613.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/33663736933.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/job_interview_samples_questions_and_answers.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_off00004ed1.bin
c19a38d2b3d54e98eed9903c1c34a731a632704c63ba0da575e600aef0f2a457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED1 4840 bytes
font_01_sfnt_off00005f67.bin
72b67e5c095cf18843bf9bc5568885abdf2a99980e2e991fde94e336a1939e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 10348 bytes

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