Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8f6c7e82f9f2a5…

MALICIOUS

PDF

56.5 KB Created: 2020-08-08 04:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb21204cf0c2ce57409762c5bb96a3ed SHA-1: a454dbe8cdee6e621537700a61dbbaf8a26fcc0d SHA-256: 0e8f6c7e82f9f2a5c4458ecec76953dc5808442a786c57a44ef8dacca7f29cc9
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=magnetic+effect+of+electric+current+class+10+chapter+pdf'. The document body, though heavily obfuscated, appears to contain this same URL, suggesting the primary purpose is to redirect users to potentially harmful content. The presence of many Shopify URLs, some marked as benign and others unknown, indicates a link farm strategy.

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=magnetic+effect+of+electric+current+class+10+chapter+pdf
    • http://files.deftspacelab.com/uploads/1/3/0/7/130775998/zukajex.pdf
    • http://files.thriftbox.org/uploads/1/3/1/3/131383698/namegi.pdf
    • http://files.lancog.com/uploads/1/3/2/6/132682063/565671.pdf
    • http://files.mdnamo.org/uploads/1/3/2/6/132681452/694362.pdf
    • http://jenexo.ferrotrend.sk/uploads/1/3/1/4/131407406/522c48e95c03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/gta_spiderman_game.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/lupebufulimofitakejekof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/calculus_formulas_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/348836770.pdf
    • https://cdn.shopify.com/s/files/1/0435/6656/3487/files/arecanut_tree_climber.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/2007_honda_odyssey_owner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/xinunabaju.pdf
    • https://cdn.shopify.com/s/files/1/0441/2915/7272/files/dutupokon.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/zipobital.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/brche_vermischte_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/cours_chimie_atomistique.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008862.bin
3a55ee0cb4682436e3c4b1afe30d2ca3453d9e1672cc0d02b2136e9c3dff6e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8862 5616 bytes
font_01_sfnt_off00009b8a.bin
3de053cfd861beb04021743d89c7959144181c3f9c59df07c2e574e71ec22d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8A 10392 bytes
font_02_sfnt_off0000bf04.bin
c00f55c8a23f8fc12478e3e4ea1bac713d25e4d1dd6e1e4bb5c667610ba6b2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF04 16192 bytes

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