Malicious PDF — malware analysis report

Static analysis result for SHA-256 378d334fc1a244ce…

MALICIOUS

PDF

46.5 KB Created: 2020-08-30 17:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11c64ecd5ff8063b73eaf52b59f93e0e SHA-1: b794f7fa19457948b2838b307db1d380a6e036b4 SHA-256: 378d334fc1a244cec272b564adc969277ca3a1bbe939e879a201e166cb30a506
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. It also features a large number of embedded links, with one specifically pointing to 'https://ttraff.ru/wix?keyword=war+thunder+me+262'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent, likely 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/wix?keyword=war+thunder+me+262
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/bollywood_movies_new_2018_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/taenia_pisiformis_mature_proglottid.pdf
    • https://cdn.shopify.com/s/files/1/0462/7762/3957/files/birthday_cake_png_photos.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6580/files/critical_analysis_of_big_data_challenges_and_analytical_methods.pdf
    • https://cdn.shopify.com/s/files/1/0441/1041/3976/files/dnd_diplomat_s_pack.pdf
    • https://static.usrfiles.com/ugd/856cea_ee5bdfd2a0d64fd086f3a892037eef50.pdf
    • https://static.usrfiles.com/ugd/136d07_8355b9014257466fb6aa6276e0060f47.pdf
    • https://static.usrfiles.com/ugd/b8c837_471ef8e33f964ebba8d3aa96f8b02e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a603dc3220846d0981cb1715f1b9116.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d2c3bb36f12404e811aa3ac48835d09.pdf
    • https://static.usrfiles.com/ugd/87d215_c7955490979d48ada8873fe553a9a085.pdf
    • https://static.usrfiles.com/ugd/b8c837_62efa845e940446e88105a7eda97732d.pdf
    • https://static.usrfiles.com/ugd/9c43ec_c1b2852b445a49799649e5d087279ea9.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/kaleida_think_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0464/7242/9718/files/margaret_wheatley_leadership_and_the_new_science.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/35396758584.pdf
    • https://cdn.shopify.com/s/files/1/0438/2860/9186/files/medical_terminology_chapter_10_quiz_answers.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007773.bin
f0e5b8d0f8517a4c54dec3e48113a5a9b1a0d0aaf60abc1247d5b4a7ad1c75e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7773 5152 bytes
font_01_sfnt_off000088d7.bin
10983d9f71f964e95035b5ee3f73b9eb174d3353ee247e3913f20c3aaa026086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D7 10604 bytes

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