Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e762c3c56ed9d20…

MALICIOUS

PDF

43.9 KB Created: 2020-08-29 11:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9267fa9fa5c5ba6fafbb2aa95614bfac SHA-1: 5c302a74092f6d718161f05f7e659346fd2715ec SHA-256: 6e762c3c56ed9d20c2da8b1fe1d0ffd2cd00d28bbc65291e6d08c4ae1a120d4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'fishing basics pdf'. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=fishing+basics+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/cours_agronomie_sol.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/jowijavezesasoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/sasizit.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/49006287226.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/caedmon_s_hymn_bede.pdf
    • https://static.usrfiles.com/ugd/b8c837_627f96bf1c454a9d8d855841d8b2b7e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e3b4622226e425fbc95cc7d4cf7127b.pdf
    • https://static.usrfiles.com/ugd/60933b_e3835b519f4f4257802b5fd1747272d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac906ab6db68407e91c2fe143e45bde9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6583fa9c66cf4fcbbe1311bb8816739a.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/3400211610.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/lener.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/55042252049.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/pivoroworiduxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/the_haunting_of_hill_house_download.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ccc.bin
447bca46912433160a9ad5485ec13236ae4ef2ac62686360456881a7d11b1d9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 5384 bytes
font_01_sfnt_off00007f0d.bin
7cbd66f4e6139b98bb6064d83b313c7cf486a3052fdec5fb6301afdb2284a5ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 10440 bytes