Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f156aebd0240fc…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 06:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ab265f5c41500a03ceb89abee4a78a SHA-1: 1210163e6ddc909dfaf593fae36721f1969e6c1a SHA-256: 03f156aebd0240fc35e06be1c47cedcd3ecc371bfa47011adadfe1f18fb5a5c5
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the same URL and a 'time table' lure, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many benign, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=bteup%20back%20paper%20time%20table%202019%20pdf
    • http://files.factsoverfeelings.org/uploads/1/3/1/4/131406222/4398068.pdf
    • http://vozokegut.securevisionmediasolutions.com/uploads/1/3/2/6/132695675/pidana.pdf
    • http://faluk.sepamujer.org/uploads/1/3/2/6/132682663/2016373.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/zokokuritekazinexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/que_es_almacenamiento_de_alimentos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/85131828800.pdf
    • https://cdn.shopify.com/s/files/1/0454/6068/4952/files/upload_to_canva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/secuelas_de_asfixia_perinatal.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/59500739291.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/61512129863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/sheekkoo_afaan_oromoo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/can_t_open_on_samsung_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/arilson_favareto.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/fudukupanofusuxideloluki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/acls_guidelines_aha_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/dobenupibuwafizabopenil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/for_example_synonym.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_off00005f9e.bin
225eea6649adc12de1e006f2429405c4ed142633905a2b8ba44d2427f2d4acb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 5860 bytes
font_01_sfnt_off0000737a.bin
b5be99692d19e7b6741277d9fbecdb1eeb479b02abdade9d69ae94006f922d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737A 9908 bytes

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