Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3661c62595cc36…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 23:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 491db1fd5951f955c4bc453e4b32bb7f SHA-1: f42af4616a529b93ebf403d2dffa2be2b553b59b SHA-256: 5c3661c62595cc3620f816e1b0d1378486a7bb9c744c29432124acb7de3adada
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=wordly+wise+book+7+lesson+11+answer+key+pdf
    • http://files.jebmotley.com/uploads/1/3/1/3/131379899/turevumo_samojofi_zexabi.pdf
    • http://files.indianasicklecell.org/uploads/1/3/1/4/131408364/vuniriwifotor.pdf
    • http://fezamobi.hvalliance.org/uploads/1/3/1/6/131606346/zugevov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2382/5053/files/autonomic_nervous_system_pharmacology_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/baldur_s_gate_descent_into_avernus_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0440/0939/0238/files/vowufubuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/zafureranepiremetufep.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/60074597816.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/11141375032.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/popowasaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/jifeguxugimutoxirakogezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/nafesinaxovuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/pefiwamuxeropu.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_off00006492.bin
1a0abc1be0dda1c82ff7ba857e80b45bec31b4eff5c1687e21c6a1483791f405
pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 5576 bytes
font_01_sfnt_off000077c4.bin
7f111745f1494d93afe5d8241ffcc4c726aa010eaf3621a8fb4e454156509107
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10468 bytes