Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd706fc81e95ad7…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 15:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17eab422038b32ca2ed709fe481f8fe9 SHA-1: 52b7a0b2f937f47ab53df429bd09cdf582cbd760 SHA-256: efd706fc81e95ad7d31cdd2d9e7ca195ebe83517160fa0ceaf158ead0cf92e3a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.cc'. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or further malware delivery. No scripts were extracted from this sample.

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.cc/wix?keyword=canon+des+scats+partition
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/85350328469.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/zezex.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/10084865872.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/82338265337.pdf
    • https://static.usrfiles.com/ugd/b8c837_adbde3aaf80a47059093da5c0e38392c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f9c85f70c984a9ea71bcdac4e2a5f33.pdf
    • https://static.usrfiles.com/ugd/b8c837_57efa042f4554f1193e576dc8e467914.pdf
    • https://static.usrfiles.com/ugd/b52961_b096aceee7244523b7df87074cb5e4fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ebeff6d22b64ba38bece24d2a57c5aa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/pes_12_com.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/vomore.pdf
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/physics_formulas_for_class_12_free_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_f233452c5c7f4ad3997400f5b8f625a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff10f24e6597413396d47af256bffd89.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b7a.bin
dab3e03b65713a94bceebc25b3ca3fcbeae38243659aa2d5f94d9edfc182cfd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7A 4848 bytes
font_01_sfnt_off00005bf9.bin
cb2e65c18ae9a654e81483f6b494f1d4a00153f4ea4dc14498e22ba66b94944e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF9 11348 bytes
font_02_sfnt_off0000812f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 4324 bytes