Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d00a5a6d05d95b…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 08:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f560f1c2e584f71e1f6bafa126f94116 SHA-1: a49577ca2d6a3dfa76c36fba9394fa4ce9c06ae2 SHA-256: f5d00a5a6d05d95ba705dceabd4181e5f269a53a42316c0f0bff1b919e27430c
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which point to SEO-optimized PDF documents hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/wix?keyword=kurama+kyoto+japan+guide`. This suggests the document is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

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=kurama+kyoto+japan+guide
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/math_101_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/fasuvodakiwebimu.pdf
    • https://cdn.shopify.com/s/files/1/0461/9458/9847/files/10427705888.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d839e889e1743e389a3da0ab895b5a3.pdf
    • https://static.usrfiles.com/ugd/8b2c09_571c197366c44c458f303fca90adbdcd.pdf
    • https://static.usrfiles.com/ugd/f459ea_b5487d9cf6bf4126afe0f4f16bdda95f.pdf
    • https://static.usrfiles.com/ugd/b8c837_980e1393dd6346279d5be4732cd1654f.pdf
    • https://static.usrfiles.com/ugd/0d2908_f899f234a0e74a93a135ac3a720c8a72.pdf
    • https://static.usrfiles.com/ugd/c63dba_45ac04d72d4245db865728227896fbfe.pdf
    • https://static.usrfiles.com/ugd/73f3b0_43adf5871910429b9e8f8becacf99c44.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_74a5adcfb64f45099f274cefa564c032.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_52dea601a41643b3b25ffb68e8cf1ea8.pdf
    • https://static.usrfiles.com/ugd/4dd980_64cd9f428ba64f0f9e7561f7939ee174.pdf
    • https://static.usrfiles.com/ugd/d55797_3ee5737224de4288826fda01e4f2a4b4.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_off00006003.bin
525ab9bf246194eceb7760188a2ff7d0d0c316933b84435bcca074cd743c22d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 4192 bytes
font_01_sfnt_off00006eca.bin
5fb63004c292d4a716949c0e69ff355de095469ceba44442c0962a015a0dea1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 5280 bytes
font_02_sfnt_off000080bd.bin
3bc2f228428fc8247cb9102eb0a82e55bb6d39b620c275a9821936e82f9af4a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 10164 bytes