Malicious PDF — malware analysis report

Static analysis result for SHA-256 1580cbbd933a1c4a…

MALICIOUS

PDF

67.5 KB Created: 2020-08-24 02:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b65d2a93cc15fbc5e0964569857d6407 SHA-1: cb2fa6e7ac93bdacc2bbff65f30be3848dfc25fc SHA-256: 1580cbbd933a1c4a70f97504a2c1e213aa1b163fd72a27c6f18406c539d38a50
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains a URL similar to the one identified by the heuristic, suggesting an attempt to trick the user into visiting a malicious site. The presence of urgency language and password protection instructions further supports a malicious intent, likely for phishing or malware delivery.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ankhon+dekhi+720p+full+movie
    • http://files.bearstatebowhunters.com/uploads/1/3/1/0/131069744/bosumekiv.pdf
    • http://files.jerseyguidedtours.net/uploads/1/3/1/3/131382092/7825424.pdf
    • http://files.holmesltd.co.uk/uploads/1/3/0/7/130739922/8055430.pdf
    • http://files.designspace-interiors.com/uploads/1/3/1/4/131483148/ea40b76f15d.pdf
    • http://wosidowux.earthrockstone.com/uploads/1/3/1/3/131379477/4047314.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/vaxezofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/75704343585.pdf
    • https://cdn.shopify.com/s/files/1/0440/2973/9173/files/lejiwomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/the_sociology_of_health_and_illness_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/rulilaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/72146199444.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/jifajami.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/necrose_caseosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/frieza_5th_form.pdf
    • https://cdn.shopify.com/s/files/1/0447/9166/0695/files/44948658083.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_off0000c9a3.bin
b665ba89968d076331f8377b7be3c300ca74055f9c19596f395a07b7043dcb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5264 bytes
font_01_sfnt_off0000db7f.bin
b201c432eadc0e2c14d5b97a79de056075e90da2244b3051df06e2337cf04190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 10988 bytes

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