Malicious PDF — malware analysis report

Static analysis result for SHA-256 7703fdefb38686d2…

MALICIOUS

PDF

36.0 KB Created: 2020-08-12 01:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4203689206c8f5c768854ce0fe3d427b SHA-1: 38245c1d57d994ed666ef850728f17e62978a0a6 SHA-256: 7703fdefb38686d2aea2e37d1df64a091ee73dd0e158567ed669bfcc14981321
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=belzoni+banner+pdf' and references other Shopify-hosted PDFs. This suggests a tactic to lure users to malicious infrastructure, potentially for phishing or malware distribution.

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.ru/pify?keyword=belzoni+banner+pdf
    • http://files.eaglehealthinsurance.com/uploads/1/3/2/7/132740277/matebabojebadib_xafinugemuxeru_xorerogufiredu.pdf
    • http://files.babsbeadwarehouse.com/uploads/1/3/2/6/132681392/ritelelujakudetad.pdf
    • http://files.ckieffer.com/uploads/1/3/0/7/130776363/7952783.pdf
    • http://files.michellelewiscandleco.com/uploads/1/3/1/4/131483266/jorege_rugogimi_latuboxuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/xefusolibodemozokat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/49064524341.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/1809513277.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/83772397752.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/intervalve_butterfly_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/7345/4748/files/dewaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/weeks_ina_year.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/wesibelobodin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/authorize_net_test_card_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/belt_cross_reference_napa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/13683188573.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/figosok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/41278596311.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_off00004e12.bin
f6131edc03aa0b19b7037182d09ba1adb6072b2d4be7f5bb02c4d22b309992b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E12 5096 bytes
font_01_sfnt_off00005f74.bin
9e5f868ae445d7b9506ce9ed22ddabf4b17b4c60a112a561c9f48f98e306e510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 10508 bytes

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