Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f318d3a0eb6af80…

MALICIOUS

PDF

43.0 KB Created: 2020-08-21 17:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67c0ea1b82a0ccada96ad2be7306626a SHA-1: 4986ca7830246085442db4dfcd17f7931dfc966e SHA-256: 5f318d3a0eb6af80ff31bbb1b7c27227b51270e7b5fcd9e26eb929c9b1c20056
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding numerous links to external PDFs, some of which are hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=channa+mereya+punjabi+film+full+hd', suggesting a lure to a malicious site. No scripts were extracted, but the presence of embedded links and the redirector heuristic strongly suggest 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.com/pify?keyword=channa+mereya+punjabi+film+full+hd
    • http://files.thirdcoasthealth.org/uploads/1/3/0/7/130775672/dd2c76.pdf
    • http://files.eric-goodman.com/uploads/1/3/1/8/131857115/3698877.pdf
    • http://litobofu.southmadisonunite.org/uploads/1/3/1/4/131409236/tamirodetew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/24603593130.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/brazzers_log_in.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/tall_building_foundation_design_harry_g._poulos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2036/0600/files/sql_server_management_studio_2016_client.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/kevedupitenulajetedagir.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/cambridge_english_starters.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/bupoduserepumujekiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/aladdin_disney_story_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7544/4631/files/kisezum.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_off00006aa1.bin
396993a854a7991adda48ba5842e9903a938e5d67186bb220687dff78a280a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA1 5328 bytes
font_01_sfnt_off00007c8c.bin
02375cd236c3d8a77e916e775c3aab334d7730789fc2b7971c3abaf4cf8fc9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 10244 bytes

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