Malicious PDF — malware analysis report

Static analysis result for SHA-256 153adbbdf8df00bb…

MALICIOUS

PDF

41.2 KB Created: 2020-11-01 20:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 601d45a5b36882ff625fd08cc482dd2a SHA-1: 1e9bf4b02b3e3bd351db5643d1ecfee26356e2bc SHA-256: 153adbbdf8df00bbecdadda5459e9155a25ec031a3ea31ecde555bc5479323f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. One of the primary links, 'https://ttraff.me/123?keyword=reese+s+logo+font', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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.me/123?keyword=reese+s+logo+font
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f9a78af5bd8d.pdf
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f98164552c3d.pdf
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5f9e07caab363.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0504/7553/2483/files/sulfate_polyatomic_ion_formula.pdf
    • https://cdn.shopify.com/s/files/1/0499/4400/2714/files/bisolu.pdf
    • https://uploads.strikinglycdn.com/files/f2f9c575-e6d4-4a55-832b-83b843e4d0ee/73213096389.pdf
    • https://cdn.shopify.com/s/files/1/0498/8859/2046/files/19240241714.pdf
    • https://uploads.strikinglycdn.com/files/5a2dcffb-904e-48f7-b9af-8ed4c45269a1/rca_dvd_home_theater_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0491/9030/5958/files/nuwave_pro_plus_infrared_oven_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0483/9148/7640/files/40528806736.pdf
    • https://uploads.strikinglycdn.com/files/5c09c490-c739-4c9f-95b8-d3efd79692b6/runed_arcanite_rod_recipe_vendor.pdf
    • https://uploads.strikinglycdn.com/files/3335109d-ebf1-43ae-b0e9-c66c84fae0cf/stp_8_68w13_sm_tg.pdf
    • https://uploads.strikinglycdn.com/files/e8860514-3933-468f-92d6-9e215a2ea121/56314964688.pdf
    • https://cdn.shopify.com/s/files/1/0503/7427/9355/files/remote_play_ps4_android_samsung.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_off00006352.bin
a3048461e12ff6a4c4f6c7881a7f3275d4eb275178e4080504e2aa329414d437
pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 4636 bytes
font_01_sfnt_off0000733b.bin
f5daf49c8b072c7ad96393ba68056c9a2db77d62af6c70695cf1c21298919aaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 11056 bytes