Malicious PDF — malware analysis report

Static analysis result for SHA-256 1857ca3b99a3c661…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 11:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad734106370ed5818349b9225396c6c SHA-1: 861898c0f6f9fedf8d356fac029652886d9a4e43 SHA-256: 1857ca3b99a3c66158f90d9ba6d36f3836b38ab6ada5ef6478f42d611018f04f
194 Risk Score

Malware Insights

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

The PDF contains embedded URLs and text that mimic search results for 'nba 2k13 cheats ps3 my career mode'. One of the embedded URLs, 'https://ttraff.com/wix?keyword=nba+2k13+cheats+ps3+my+career+mode', is flagged as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests this is an advance-fee fraud, likely using the lure of game cheats to trick users into visiting malicious sites. The PDF also contains a link farm, indicating a broader effort to distribute 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=nba+2k13+cheats+ps3+my+career+mode
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cdb50c_05b75c3635774372b8ddfa80a6c57b8d.pdf
    • https://static.usrfiles.com/ugd/c20ea7_248b50c76ad045ea893367431fe2271f.pdf
    • https://static.usrfiles.com/ugd/b8c837_27609062bb324a1bab5eda05fec4183c.pdf
    • https://static.usrfiles.com/ugd/6924eb_bc527196f62f433f85bb8932c9b72fc9.pdf
    • https://static.usrfiles.com/ugd/7c3584_cda989f160e94c5698be1ec4eedaf265.pdf
    • https://static.usrfiles.com/ugd/dd4472_dd694622c5e9430ab3942fa6d6d12502.pdf
    • https://cdn.shopify.com/s/files/1/0436/9665/2442/files/slope_indicator_vibrating_wire_piezometer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/kanemunewasogifidelotogal.pdf
    • https://static.usrfiles.com/ugd/49be48_a105834a67044deda41fbb83eb2a2284.pdf
    • https://static.usrfiles.com/ugd/930050_3aeee2a4cf414bdfa3f5210cff74f3c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8649b4894614051aeb2fadee47746f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d453f29562f478f9de2db5135a578fe.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_5c2c870488644564a9c26e31580041cc.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_off000060a3.bin
a1c336e5397499318cc45f9c4aca877a3b2a5620a594de493b968f86c56e58dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5904 bytes
font_01_sfnt_off00007498.bin
167473abb96bb690b8b3fd279c2ff450b3429723f00190c076a2c83b8db47940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7498 10336 bytes

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