Malicious PDF — malware analysis report

Static analysis result for SHA-256 9953666177d8518e…

MALICIOUS

PDF

44.7 KB Created: 2020-10-30 08:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee84ba6abe1b92a70345ea1735c8850 SHA-1: 5d3e97798dc7f13244226b250ae754b96b088c93 SHA-256: 9953666177d8518e36bab81804fc2cdea68bee94b1406463ad8ce941dc565569
122 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.me/123?keyword=motherhood+free+returns'. The document body, though heavily obfuscated, contains this URL and suggests a lure related to 'motherhood free returns'. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for phishing or a scam.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.me/123?keyword=motherhood+free+returns
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f939738a88a4.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f98239a60163.pdf
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f88824e7bd99.pdf
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f874376599ce.pdf
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8728a96a90d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/8276/0601/files/how_long_do_bearded_dragons_get.pdf
    • https://uploads.strikinglycdn.com/files/f95fd9fc-e9a9-4ff6-8891-5f368734b4b5/felilopawipowufil.pdf
    • https://cdn.shopify.com/s/files/1/0501/1062/8008/files/investigating_oceanography_sverdrup.pdf
    • https://cdn.shopify.com/s/files/1/0500/3457/3501/files/panekitelokekibitiwew.pdf
    • https://cdn.shopify.com/s/files/1/0497/2881/5284/files/ragebudopupadifu.pdf
    • https://uploads.strikinglycdn.com/files/13a12fe4-f849-48d7-a903-0bd0877c88a6/25552192197.pdf
    • https://cdn.shopify.com/s/files/1/0486/1018/1280/files/asra_anticoagulation_guidelines_2020.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_off000070cd.bin
17c7645536d5f391ebc058d4e30e229ae098e1ab56f46edfc96c6008fd2441e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CD 4756 bytes
font_01_sfnt_off00008100.bin
adaea58670b553b92a3480fe45e70621fa0f41fd7cf31c900b9b6e78f6838861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8100 11056 bytes

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