Malicious PDF — malware analysis report

Static analysis result for SHA-256 1addb704aa09e29a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 19:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9dfe62f872e3cc5a6a0ce5533d63089 SHA-1: a547fa60d06212224b696377d7bd70e3433609f1 SHA-256: 1addb704aa09e29a8a9d1f5926f61a1f359b97efef921e9577bfa8b7c35abbf7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious component. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify links, suggesting a coordinated effort to distribute malicious content through a network of seemingly benign-looking documents.

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/pify?keyword=marriage+affidavit+format+pdf
    • http://files.winetruffleboutique.com/uploads/1/3/0/8/130874162/kejezaram.pdf
    • http://files.hearthrobgr.com/uploads/1/3/0/7/130739132/wowowamoniziwegavog.pdf
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdf
    • http://files.mrscormiersmathclass.com/uploads/1/3/1/6/131607075/bukuvizaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/wuxetelavedijeganag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/fisaxag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/67178003940.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/14502802478.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/78662446151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/kekalusadub.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/3429907213.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavijado.pdf
    • https://cdn.shopify.com/s/files/1/0435/3638/4159/files/13849237184.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/jenut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/guwujiwepejewagopejoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/xakatupinikog.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_off00006f74.bin
d2bdefffbc5810bcd899ad1606763a0a72a9703e87284b9cf64466c2646ea565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F74 5216 bytes
font_01_sfnt_off0000813b.bin
734b2f70afb3552301bcb2a9ea25aa8d0beb9dc46881fe4db3f46dcbca1fa3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 10036 bytes

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