Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ec8cba6ffcc256…

MALICIOUS

PDF

41.4 KB Created: 2020-08-20 01:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 909483497773476d942274f9832f6f14 SHA-1: dec8b3b3d90b5d84548022f3f0c469ee00040852 SHA-256: 17ec8cba6ffcc2567d195c8c41115a738ed87a00f3b71dad114dd356b7d7b69c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though partially corrupted, contains text related to 'Oracle ilearning quiz 5 answers' and includes the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to distribute malicious content.

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=oracle+ilearning+quiz+5+answers
    • http://files.fallsburgsfuture.org/uploads/1/3/1/3/131398143/matebobubisaxanobev.pdf
    • http://files.visionsusa.org/uploads/1/3/1/4/131453054/bdc51e307bf9.pdf
    • http://nujorez.propertyinpizzo.com/uploads/1/3/1/8/131856998/8018070.pdf
    • http://files.eskynazarene.org/uploads/1/3/1/8/131856308/juwirop.pdf
    • http://files.queensofcountry.net/uploads/1/3/0/9/130969297/gozomube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/automotive_abbreviations_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/79273624230.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/autosar_adaptive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17612659915.pdf
    • https://cdn.shopify.com/s/files/1/0447/9261/0977/files/enigma_otiliei_comentariu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/voxivag.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/rapatimafufigubejexot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/cognitive_behavioral_therapy_judith_beck.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/mic_wont_work_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/building_cost_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/tuliruvamakabemine.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/quran_translation_in_english_with_arabic_text.pdf
    • https://cdn.shopify.com/s/files/1/0445/8404/2655/files/16100951945.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_off00006206.bin
0942a5787b345df91a685d36cd61256d4bd8538d644b50c76bff9d862cd89511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 5388 bytes
font_01_sfnt_off0000747f.bin
683a9020a569688008da0dd75de9a460ef8f2075ea3ee4fc18fffb2b70ab58c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747F 10040 bytes

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