Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0ee789cfebf0bd…

MALICIOUS

PDF

45.4 KB Created: 2020-08-13 23:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf456c16fe36633919665930079ddaa SHA-1: 1a52fa2a2d38eb913bb7717cab70959758dfe3d6 SHA-256: 1c0ee789cfebf0bdc4e6a1e1263fc8ea744c3ac5b27004e742f6155d5eed8228
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to domains associated with link farms and redirectors, such as 'ttraff.cc'. The document body text, though partially corrupted, includes the phrase '2 forms of identification employment', suggesting a lure to trick users into clicking these links. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a likely attempt to redirect users to malicious sites.

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=2+forms+of+identification+employment
    • http://nalur.clarebellworship.com/uploads/1/3/1/4/131437812/lazajurasowepot_getodav.pdf
    • http://files.thelegendsataberdeen.com/uploads/1/3/2/6/132695832/melitadakediwiv-notogufe-mibukesupawige.pdf
    • http://kovatesoz.throwninafit.com/uploads/1/3/1/4/131453060/vumezif.pdf
    • http://bodozu.transitionplan.org/uploads/1/3/1/4/131437615/1952548.pdf
    • http://files.msbrodysclass.org/uploads/1/3/1/3/131381237/785772acb31bae.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/autocad_plant_3d_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/square_d_9013fsg2.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/gudiwezixexunazulosileti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/jipikibizixurigepesa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4178/files/sazutipowimodabo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/lopotiwizunoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/8915784211.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/ct_drivers_license_lookup.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/50690303333.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/poxuzufobekop.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_off000072a2.bin
8555293f7662329496b6e28ec84591211fa1254ba5a52bcfa8588732b6186767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 5440 bytes
font_01_sfnt_off0000850d.bin
6e85d410d8c8eb67f5300fa07ab268c2e3253602a20ad1bd638d1fec61b775c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850D 10428 bytes

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