Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f596fe1391b5dfa…

MALICIOUS

PDF

64.7 KB Created: 2020-08-10 17:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49959665182f9fcae9163fa75448cb01 SHA-1: 7a03d4b6175451e170438333cbb6067d4b00a488 SHA-256: 6f596fe1391b5dfa71a14a51508daa7d5dbb9bcbb23a9591b2a9980e8dc00478
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/pify?keyword=business+administration+project+topic+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, but the PDF structure and embedded URL strongly suggest a phishing or redirection 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.cc/pify?keyword=business+administration+project+topic+pdf
    • http://files.determinedart.org/uploads/1/3/1/8/131871614/e80aef3da53.pdf
    • http://files.springvillebaseball.com/uploads/1/3/1/1/131163878/4542659.pdf
    • http://vejifik.arlenegersonphd.com/uploads/1/3/2/7/132740214/cc1e238.pdf
    • http://files.sweet-williams.com/uploads/1/3/1/4/131409677/fipew.pdf
    • http://files.transfermarketgroup.com/uploads/1/3/1/3/131380842/691834e35748.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/zazabifoxuvega.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/bobine_lectrique.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/teruvofilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/80377824284.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/nomaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/amrutanubhav_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/magega.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/connaught_place_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/85456558744.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/webejize.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/gofibek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b171.bin
0624d828cac1a0c16ff44ffb39575f433d54373ac907747bb76463baa6d9dadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 5276 bytes
font_01_sfnt_off0000c341.bin
ffdc3349ffe14268bda53cd893160f5428fe3fabadb5371dc0dc9890b52e49ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC341 10632 bytes
font_02_sfnt_off0000e74f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 4324 bytes

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