Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73d9709c9d9380b…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 23:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 104d0fbf2dad394e1d791ef3a789161d SHA-1: da5af574c25411c4d46aeee69dde62e89c809cb2 SHA-256: d73d9709c9d9380b18de0eb15069ba2e86101808d26412a8008fd55b656097ad
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=bharat+movie+ke+video+song' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other embedded links, suggesting a lure to external content. The ML classifier also strongly indicated maliciousness.

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=bharat+movie+ke+video+song
    • http://files.murphybedsetc.com/uploads/1/3/2/6/132695200/mamod-gagoku.pdf
    • http://wokasej.rootminerals.com/uploads/1/3/1/6/131606490/sasulibotidajuwesaz.pdf
    • http://wolex.kingpestcontrol.com/uploads/1/3/1/4/131437792/168551.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/33204074990.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/avengers_movies_in_order.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/mappa_turistica_di_bologna.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/51819046968.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/59799256787.pdf
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/55733707784.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/wewinalaxasaravisuxifujud.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/23736049170.pdf
    • https://cdn.shopify.com/s/files/1/0428/1820/7911/files/14040572106.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_off000055f4.bin
17e593459d22b983739df9159a14869de7b0be4d21640282f4457f842c0293ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x55F4 5380 bytes
font_01_sfnt_off00006822.bin
e844cf0350609f1ac90609d39343d51009cb17fb9776b74b25f8eb1ad053c03f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 10060 bytes