Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1442800af5b4aa…

MALICIOUS

PDF

55.8 KB Created: 2020-08-21 16:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ae1f4d723e18d06bcb3ab7c802a317a SHA-1: 01134d7c9a8c3be2ca34cc23a2f3b27218580ff3 SHA-256: 0f1442800af5b4aa6f8f5e1f732475363f9c7e927f984563db6429c207ef1c09
202 Risk Score

Malware Insights

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

The PDF contains embedded links and text suggesting a lure related to 'e aadhaar card by name', which is a known tactic for phishing or redirecting users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector link farm and potentially an MFA lure. While no scripts were extracted, the document body contains obfuscated text and URLs pointing to potentially malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=e+aadhaar+card++by+name
    • http://files.pyuschan.com/uploads/1/3/0/8/130874102/kemutok.pdf
    • http://fufunud.ojibwe-dakota-in-mn.com/uploads/1/3/1/3/131398008/7f8b3e4c0af.pdf
    • http://files.ascensionepiscopalchurch.org/uploads/1/3/0/8/130874125/figofix-ditepolefez-musufuda.pdf
    • http://files.vshtimbersptyltd.com/uploads/1/3/1/0/131070841/17f0bcb28c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/73373058313.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/57049365071.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/intermezzo_cavalleria_rusticana_string_quartet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6840/files/hylton_ross_tour_guide_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/aislamiento_e_identificacion_de_enterobacterias.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/dujewakaxivagitoxuko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/meratewopofidadiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9833/2572/files/how_to_writing_incident_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/sutedokiluzalatomekatexez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/9393534362.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/93800346984.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/xozixexafuzotenenuk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008913.bin
a3aef484385df1043322359609326d020cb984f334eed5d332e7eff1fbc841b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8913 5168 bytes
font_01_sfnt_off00009a78.bin
de7446cbc38fdd014e9817eb00cda02015948640f4032c412c05573bd636a164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A78 10012 bytes
font_02_sfnt_off0000bd09.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD09 16144 bytes

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