Malicious PDF — malware analysis report

Static analysis result for SHA-256 b547b2dda83e3b6a…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 08:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8b2a298963ea15cfa64d5f3767d5fa4 SHA-1: c60a6138355afd17c7a160556e6c5b801da06f2f SHA-256: b547b2dda83e3b6a7d9c6a7b00a775845e1f3f20750ac8bad011d884a1db649a
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Solidworks tutorial 16 pdf'. This link points to 'ttraff.ru', which is flagged as malicious infrastructure. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign Shopify URLs, likely for SEO manipulation. The primary malicious intent appears to be directing users to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=solidworks+tutorial+16+pdf
    • http://files.belleminks.com/uploads/1/3/2/6/132681325/sinizoti.pdf
    • http://files.thealbertafloodroseproject.com/uploads/1/3/0/9/130969555/13cd00738d.pdf
    • http://files.jaimerosenstein.com/uploads/1/3/0/7/130776536/25b807eb5.pdf
    • http://files.harrisontheater.com/uploads/1/3/1/3/131382092/6abc54cbf.pdf
    • http://files.placercountyreviewagency.com/uploads/1/3/2/6/132695200/3022409.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/light_reflection_and_refraction_class_10_sample_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/compendium_of_catholic_social_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/42661780615.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/lasulotabifilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/tixapunud.pdf
    • https://cdn.shopify.com/s/files/1/0440/0247/6190/files/dudeviderovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/lagrange_s_mean_value_theorem_proof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/27909002430.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/64709026393.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/pumovitujomabewixad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/73723537243.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/lean_on_major_lazer_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/tutorial_carding_amazon.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/15461294817.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_off00006fe8.bin
f331c012f811b9b3cab417f418d9b899abae9c8c6020a7197a97766ecb50b960
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 5500 bytes
font_01_sfnt_off000082c1.bin
fd15cd4a86a2e62f85cf4b501d5d81973592c8a0f6b9672612301189c9a2c004
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 10428 bytes