Malicious PDF — malware analysis report

Static analysis result for SHA-256 796571cb89969446…

MALICIOUS

PDF

115.4 KB Created: 2020-08-02 09:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a492a03c584e081a22048da3277d52b2 SHA-1: e078d035f712b1dd368df8324188f9a27d1fe6c4 SHA-256: 796571cb899694469b8d660b0f3072daa45bc28f4e137e315f2f597407c45048
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host SEO-optimized PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the target URL, suggesting a phishing or scam attempt.

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.cc/pify?keyword=auditing+cases+an+interactive+learning+approach+pdf
    • http://files.terramutt.com/uploads/1/3/1/4/131407492/newesu.pdf
    • http://files.ftbk.net/uploads/1/3/1/4/131453674/lebetub-tanenide-penuvor.pdf
    • http://files.stephaniejanaina.com/uploads/1/3/0/7/130775257/e4dd5.pdf
    • http://files.premierebasketball.com/uploads/1/3/0/7/130775658/e64deae95b2b.pdf
    • http://files.scottishstevennyc.com/uploads/1/3/0/7/130739340/8830723bd01f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/29309197875.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duliwoledemovaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/54305092976.pdf
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/fazamesagariwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4831/files/pojepodufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/17701248398.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/63720651942.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/30379041083.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/12010332210.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/33965896451.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6966/files/tovidesunemajud.pdf
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/2013_kia_soul_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/minecraft_how_far_away_do_mobs_spawn.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_off000179ab.bin
5309138a06d4eca61db02293d4c01356530b5ffa4f30ff486767f7c969205e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179AB 5464 bytes
font_01_sfnt_off00018c49.bin
e32c4072c5401e03f3b1b871bf3d4c8dafef431e79e0a1120da3547f691e948f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C49 16616 bytes

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