Malicious PDF — malware analysis report

Static analysis result for SHA-256 109d38704102c289…

MALICIOUS

PDF

49.4 KB Created: 2020-09-07 00:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c94941a456cf7b777b128163b7fa174 SHA-1: 101d3f657eb501673e849978023ce9588d68bdf7 SHA-256: 109d38704102c2899d19e33c1e9fb37dfdf18ab4cf538c6c48b37720abaaf8d2
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free resource, which is a common social engineering tactic. This link leads to a redirector known to host malicious content. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of a malicious redirector and the lure indicate a phishing or malware distribution attempt.

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/wix?keyword=free+after+effects+templates+text+animation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/pesuzapelam.pdf
    • https://cdn.shopify.com/s/files/1/0463/2851/2667/files/10651218381.pdf
    • https://cdn.shopify.com/s/files/1/0437/3164/8663/files/crystal_reports_runtime_for_visual_studio_2012.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/fejevapolinisimigamaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/bangla_history_book_free_download.pdf
    • https://static.usrfiles.com/ugd/5926b4_edc8afb3b30a4581831a7090c71e051f.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_81fd3efdad604cedb36c05a0834c5da5.pdf
    • https://static.usrfiles.com/ugd/3f4b99_e09a494d38344bf3940516b390a7ba39.pdf
    • https://static.usrfiles.com/ugd/cbe325_2d0603eacea1400aa6fd6adcafc71260.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/freelander_td4_clutch_change_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/spanish_nouns_and_articles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/safulupok.pdf
    • https://static.usrfiles.com/ugd/909b15_27592f228240427c9506178069eaf5ef.pdf
    • https://static.usrfiles.com/ugd/89c6ad_47920f9ef69249929c21fc8308554831.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_off0000841e.bin
85ece7a3a12022697eecae5453090e4311da19112ac044876fa0e6279d5aabd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 5184 bytes
font_01_sfnt_off000095b3.bin
ed7fe39cef2d8553f4dda022473c15fd4e9b97af36ffd80ab2cd166b061de85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x95B3 10244 bytes