Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e97fc76293113b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-08 12:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8c02e6a7c7d06891c91b9bf051cee22 SHA-1: 3b6506524df11205231f7cb9fe87d74f2f303f99 SHA-256: 13e97fc76293113b0b71d1b9d4f3376ad72cab68e31fcdc07fd78f4c67593aec
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious sites or download further payloads. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to 'Ecologista definicion pdf'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to increase visibility and traffic to the malicious redirector.

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=ecologista+definicion+pdf
    • http://wovidebu.homegrownpillows.com/uploads/1/3/0/7/130738993/xepuposud-pagadozadima-daramajun-gidadusunugizid.pdf
    • http://files.humanresourcesolutionsllc.com/uploads/1/3/2/8/132814123/nixalepuraporo.pdf
    • http://files.uclacogsci.com/uploads/1/3/1/4/131483830/4319248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/livanele.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/guide_to_managerial_communication_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/oath_of_vengeance_paladin.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/50035390697.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/82025632849.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/7484271788.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/fubusox.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/867464413.pdf
    • https://cdn.shopify.com/s/files/1/0430/5666/0633/files/59346001480.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/cardiogenic_shock_review.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/melapatujapexez.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_off0000603b.bin
bf7dd5578e5b12b0927b85f56771e99d35963856aa4de8094286a462bb202a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 5184 bytes
font_01_sfnt_off00007201.bin
213428e1a58f949e64c42aded6259e1221f5e9ce585d0cec3a4634180023389e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 9508 bytes

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