Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1e990c62124d01…

MALICIOUS

PDF

38.2 KB Created: 2020-08-14 04:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fa1b4355ce9ec40395c3f677da3b59 SHA-1: 7781b2f776b08956686ee37e802cd4076b6ae811 SHA-256: 2e1e990c62124d01ceff93da091a5f3f53c43b198eb41a04d4248ddc1df21d17
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'performing arts jobs brisbane' and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination. The ML classifier also 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.cc/pify?keyword=performing+arts+jobs+brisbane
    • http://files.correctedculture.com/uploads/1/3/0/9/130970008/6344682.pdf
    • http://legipuli.jazzbeyondborders.com/uploads/1/3/0/7/130776394/denonazego_pukogediz.pdf
    • http://vanow.shadesofartistry.com/uploads/1/3/1/8/131871674/kinil-towowoniropeko-buzatolinasuwed-lidagavezami.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/libros_de_ana_catalina_emmerich_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/puzavunogivujifitokepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/ponejeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4334/7877/files/potesul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/84330769243.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/41501039068.pdf
    • https://cdn.shopify.com/s/files/1/0439/5103/0430/files/livros_apocrifos_em_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/97601246886.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/fobufizenijidudizidaseteg.pdf
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/logical_reasoning_questions_and_answers_for_cat.pdf
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/64864427288.pdf
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/rapusutajoluzo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/bovogibajurogepanel.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/roxokemepowipod.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_off0000563a.bin
37cf44d8dcbc88a4098dcdff3596d82d188c58d4849f504a9240b89f32721636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x563A 5272 bytes
font_01_sfnt_off00006812.bin
f16981cf4493789a5ef23427e2b4176818a987679fbfba5f04a7cb6c232bc97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 10580 bytes

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