Malicious PDF — malware analysis report

Static analysis result for SHA-256 a696ac035bda0cd3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 02:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f19df27a1dfd7370f6b9e7bdfd1f4cbd SHA-1: 5f2a4f299f803ec60dce33fb2419b3a11e0b01e3 SHA-256: a696ac035bda0cd312ba8d599c34d71bffc3401f57451e84cfc754e178678ad7
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely part of a phishing or malware distribution chain. The document body also contains this URL, reinforcing its presence. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, but one critical URL stands out as malicious.

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=adventures+in+japanese+1+workbook+pd
    • https://static.usrfiles.com/ugd/238140_13a77d50cf884485b31f8e666425eab0.pdf
    • https://static.usrfiles.com/ugd/ae15ca_0a0babe5ab1f4ebab7a5280ae515cf21.pdf
    • https://static.usrfiles.com/ugd/067ecb_aa0c78cc411f48f0b3565ee8983caa8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_89ba8acef18a416eab540a220f16fe61.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/thomas_aquinas_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/c5_9fark_c4_b1c_c4_b1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/bajekobumixifojolid.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/acca_f7_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/dezitewuvamukajaributatuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/meaning_of_social_class.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/24050446548.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/adoration_prayer_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/xixavumofiwasuwerimedok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/motufotumodexis.pdf
    • https://cdn.shopify.com/s/files/1/0456/8734/1215/files/digital_electronics_a_practical_approach_with_vhdl.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_off00005e29.bin
2754f6fedaa4a982f17d7927d5bc6fade4dce54fa818e5fd066a576998bceb5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 5392 bytes
font_01_sfnt_off000070a8.bin
8046ef8eb8f7137d95b41d67a648ab2a5c975424e95e15e46a332555455547b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 10740 bytes