Malicious PDF — malware analysis report

Static analysis result for SHA-256 11286e8ee301d22e…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 01:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbfe23e2d14fc53d1ab880e41c5d1ff7 SHA-1: 0284445c267358b3e81939bbe3d89dc480125da9 SHA-256: 11286e8ee301d22e56350db517525c77e40848357037ccbfa29341c0f4cd62b2
182 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting an invoice or payment lure, consistent with phishing or scam tactics. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site.

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.
  • 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.com/wix?keyword=meebhoomi+app+ing
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b7ab08_9708d46681ca43aeb7356d24a1137677.pdf
    • https://static.usrfiles.com/ugd/f63f29_a3f6a7df04864455b253257196447886.pdf
    • https://static.usrfiles.com/ugd/ae059d_ede127cf3e87426797e55d08299e4a96.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/biwojabafova.pdf
    • https://static.usrfiles.com/ugd/de3d83_ec064c88d8ae4e529dc95444245d7377.pdf
    • https://static.usrfiles.com/ugd/f63f29_7f9a93ce010141aeb61acfcf0c775f4e.pdf
    • https://static.usrfiles.com/ugd/cc089a_93e179cffded422c8ca463f911cc41d6.pdf
    • https://static.usrfiles.com/ugd/837d34_8141294d0ab648af82fc2edad02ec0ff.pdf
    • https://cdn.shopify.com/s/files/1/0432/2780/7908/files/91384041702.pdf
    • https://cdn.shopify.com/s/files/1/0465/0965/4174/files/totojopozisugawutebabuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/psychological_assessment_report_for_court.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9901/files/malayalam_kambikuttan_app.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/41765399085.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_off000061a5.bin
18cb9390b13f0093888c2a259a70e0305449f6242e15beb36490954ad79262a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A5 5072 bytes
font_01_sfnt_off000072cc.bin
a0878b499a3b877b8eb458dd11ceeb852903f3e450e2d16bf399771a30af91dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 10604 bytes

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