Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2ab126aa0a6b6d…

MALICIOUS

PDF

53.0 KB Created: 2020-07-30 15:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7399923c87fff3dc190b0590c9dc95f SHA-1: 6fdda7ad7cee362354678e98ce73426e655e4535 SHA-256: fd2ab126aa0a6b6dea196120f929e480dff8eb345c5a2f6890068ecd58e997f4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'catalog'. The presence of multiple Shopify-hosted PDF links further supports a link-farming or redirection strategy. No scripts were extracted, limiting the analysis of direct payload execution.

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=cat%25C3%25A1logo+mary+kay+diciembre+2020+pdf
    • http://files.trangmar.com/uploads/1/3/1/3/131383892/kupuxojomexe_sutugezelesa_tovumimovax_baxatuxetopegiw.pdf
    • http://files.viewthis247.com/uploads/1/3/0/7/130776166/e41915c9df461.pdf
    • http://files.besomeoneco.com/uploads/1/3/2/6/132695829/17105de685b1c71.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/bisiwer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/wujuwusilegakule.pdf
    • https://cdn.shopify.com/s/files/1/0433/3885/8650/files/luladerafera.pdf
    • https://cdn.shopify.com/s/files/1/0436/0237/8915/files/37360248182.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5355/files/84473501002.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/wusabesudonudaxunume.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/jafamoladev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0438/2418/5506/files/vujesumux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3152/files/gaxititar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/65656521928.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/16468208359.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075bc.bin
010ddbe4b3698648ff6c1e21bb95ddfce7353b158e498a99a3664e91bac3c68a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 5816 bytes
font_01_sfnt_off00008919.bin
5c477479b29b59af4a26d62096b027b368034d628926c21d1779e0e6120a5afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8919 11540 bytes
font_02_sfnt_off0000af37.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF37 16060 bytes

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