Malicious PDF — malware analysis report

Static analysis result for SHA-256 6982b4fcaac6eeca…

MALICIOUS

PDF

66.7 KB Created: 2020-08-13 23:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c47e969b31d0f2fe0fe614e4def3b54 SHA-1: ad64919e7d1783ff144cb056d82628a8456107f7 SHA-256: 6982b4fcaac6eecac34c14f8e0f1305be66ecf3fc36ff5c47d2fed1fbdbfed09
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.com). The ML classifier strongly indicates maliciousness. The presence of a 'download' button lure and the embedded URL suggest a phishing or scam attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chspe+secrets+study+guide
    • http://files.virtualhealthcarenyc.com/uploads/1/3/1/6/131606674/mamotewijedul.pdf
    • http://gijuv.mccullycomfort.com/uploads/1/3/2/7/132740405/7277003.pdf
    • http://files.ccepotomac.org/uploads/1/3/0/8/130874238/benefiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/66278674750.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/kadambari_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/likadumir.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/46198683777.pdf
    • https://cdn.shopify.com/s/files/1/0441/2106/3576/files/valudosuxedulalakujiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/61990024160.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/13536281225.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2677/5196/files/dojowinajafaxubowojanore.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/74423192712.pdf
    • https://cdn.shopify.com/s/files/1/0437/2178/5498/files/werugagorojetubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7549/3271/files/32610207704.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/mibef.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_off0000c868.bin
1de681ad3b0f711b2388e1c2d76f4903e9836620cb8ca27daad28bd06927ba31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5100 bytes
font_01_sfnt_off0000d9c8.bin
bca315bc327caa17eb8da880e51697416a67cc8dd79b7831ec6113766c97f4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 10476 bytes

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