Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e0b128fc794441…

MALICIOUS

PDF

53.5 KB Created: 2020-08-10 05:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11f30963731dbbb2377f05bfcdd7126e SHA-1: 0dceb517996930c57dabb9466445c529bb305370 SHA-256: b6e0b128fc794441aed1489fd5b578febc27390cb48ca58636aec15f550e7e1d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector and link farm indicates a likely phishing or malware distribution 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.com/pify?keyword=bhagavad+gita+quotes+malayalam+pdf
    • http://files.westport.votersguide.info/uploads/1/3/0/8/130873872/5732686.pdf
    • http://files.starwheelprinters.org/uploads/1/3/0/7/130739308/jekakex.pdf
    • http://files.britinn.at/uploads/1/3/2/6/132695445/nawuvo.pdf
    • http://files.focusmachining.com/uploads/1/3/1/3/131380598/zokesakadow-kebinuwokomarup-dukatugu.pdf
    • http://nudixefe.familycarestl.com/uploads/1/3/0/8/130873995/xubenunixawex_pitob_wigivaji.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/27824911891.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/93584000640.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/successful_agro_tourism_innovative_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/6862757969.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/23551981540.pdf
    • https://cdn.shopify.com/s/files/1/0433/6952/9509/files/88480776634.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/airline_feasibility_study_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/jarogakovev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5552762143.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/geridirupusaluzoperitij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d93.bin
bf15d38bc24a0ccc74fed6ee2989e07cf64515f3a348606bc38a151ea07d00c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D93 5696 bytes
font_01_sfnt_off000070d9.bin
b2dc79d23ffb943b43c1b7d2fea29d1a060c0d10ea39006dd301c5f8cce82f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 17248 bytes
font_02_sfnt_off0000a691.bin
98a6bba9f6f07bd619ebade32216d119bc7c05789506dd6b392c8793d7ae56d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA691 9956 bytes

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