Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffd5b10310ccbd7…

MALICIOUS

PDF

38.2 KB Created: 2020-08-09 04:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fdbe182a500e16bdea77e30f546ad9a SHA-1: b7082c5dc7d0ef3aa8d0c3081e1662f9a6f05a51 SHA-256: 6ffd5b10310ccbd739332a643b89b6517fdcf843056ba7228e97d002f4aafd9c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a fake download or service. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm SEO tactic to obscure the malicious redirector. No scripts were extracted, but the primary malicious function is the redirection to a harmful URL.

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/pify?keyword=edit+pdf+to+word+online+gratis
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • http://files.braemarmensclub.com/uploads/1/3/1/4/131453060/482556239.pdf
    • http://files.conejoroyals.com/uploads/1/3/1/4/131438682/pafotamafakaxuzowux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/sorigufukepolokatem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/78773123969.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/self_assessment_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/thinking_fast_and_slow_summary.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/ab_initio_metadata_hub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/pdfill_editor_registration_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/acls_instructor_manual_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/24559453739.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/nezelonirozarurofitu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8261/0843/files/introductory_chemistry_5th_edition_nivaldo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/dawetuwuzusaxeravubem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/adrenal_body_type_diet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/48909739527.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_off000056a6.bin
8fa1c6975904955d3a20a943984ff308d2ee4e74006c12cf02dcf38ca57b4a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A6 5256 bytes
font_01_sfnt_off000068b2.bin
e8923cd8769acd4e31f96b247943f5b28c8593d1961bf3cffa8205ade65dd7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 10192 bytes

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