Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10b42a24f195db3…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 00:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 379ac99fff05aff21570c98c185a9750 SHA-1: f4d676006a6647bdb1cfcae3812b5f624cb75536 SHA-256: e10b42a24f195db3bbf456c3567879df1f809e95a436ec4226fab21da473a9d9
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'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign content on Shopify, likely to obscure the malicious link. The ML classifier strongly flagged this PDF as malicious.

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=consumer+reporting+agency+employment+background+check
    • http://tapovaweg.greenwichlight.org/uploads/1/3/0/8/130874254/4615408.pdf
    • https://cdn.shopify.com/s/files/1/0428/7266/8319/files/ken_blanchard_situational_leadership_model.pdf
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/all_definitions_in_c_language.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/redebuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0813/8150/files/89779451544.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/repiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/ekisaito_me_ru.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/42354489165.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/watch_sausage_party_online_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/setixituruba.pdf
    • https://cdn.shopify.com/s/files/1/0435/8435/6507/files/sowibit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/94079101205.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_off00005e0d.bin
0d1fe5d9e628cf923d1947f7d5143882de69b7593a88f4c473e5dd13de3741ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 5700 bytes
font_01_sfnt_off00007147.bin
32d7a7887aaa5298f9ff139ae8995f469f5a8356c144763a6b94511e6729fb8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 9880 bytes
font_02_sfnt_off00009329.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9329 4324 bytes