Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0e3b5c033c175f…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 22:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0827424e49d2fc208092c38c2b1eea1e SHA-1: 29fc9b8d11b38b4e17f508b1280bdaff8c3687fd SHA-256: 4e0e3b5c033c175f2e256a9c760a7e10863d1cb0ea21c8d7362ca4271ab016b3
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. One of the primary URLs, 'https://ttraff.com/wix?keyword=legally+blonde+book', is identified as a malicious redirector. The document body contains garbled text but includes the same suspicious URL, suggesting an attempt to disguise or embed malicious links within the document content.

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.com/wix?keyword=legally+blonde+book
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/burimikujewoviwibut.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/35016974177.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/butaligixugobotozotazuzam.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/78305253204.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/googly_eyes_template_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/64070520386.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/60698862101.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8314/files/cofactor_of_a_3x3_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/general_comments_for_report_cards.pdf
    • https://cdn.shopify.com/s/files/1/0433/1556/0616/files/95426479121.pdf
    • https://cdn.shopify.com/s/files/1/0461/9108/3678/files/2005_cadillac_escalade_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3277/files/tabonudawuvuwomobesi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/44951493407.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5004c732a854fe490da7c63f88c82dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_165ba7408e5c438182cb6fd99e60f9c1.pdf
    • https://static.usrfiles.com/ugd/e73fea_7faae06a09d949f3a142da03a44eeab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c626649102a4549a26980a6f02a05ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3231aef4ee41f991438e683adcb6bc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a5.bin
8c36ff9405ca9e8c735fad6d9fcff8910d39ca66547d68cf2586406eba5be90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A5 4964 bytes
font_01_sfnt_off000078ab.bin
2f25f479beea7084758758e151c3e87c40bc5761a8a5962afafe5fd85673fb9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AB 10120 bytes

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