Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0769d39c08a3ce4…

MALICIOUS

PDF

36.0 KB Created: 2020-08-11 19:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29593a1dede28db9bd6efd7070f8ec13 SHA-1: 42621f6b0e978fa784e3e645b9cbffe19cf8fe9d SHA-256: d0769d39c08a3ce4e5fe14eb97f3eabb18e0d17f4a7c1aaeb00ee876f581fc95
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded URLs, many of which point to a link farm designed to redirect users. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to obscure the final malicious destination, likely for phishing or malware delivery.

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=administracion+publica+federal+unam+pdf
    • http://wezikabob.lizsaare.com/uploads/1/3/1/1/131163635/add726155f2d713.pdf
    • http://files.timhunterartwork.com/uploads/1/3/0/8/130874162/gejad_jusufeju_ramatuzasig_zopivusibos.pdf
    • http://files.larissafall.com/uploads/1/3/1/3/131379706/paponim-kaxiwe-tukokukej-nalegap.pdf
    • http://files.acjs-mws.org/uploads/1/3/0/8/130814515/rasutobaxutumozinuxo.pdf
    • http://tupove.therestorationshoponline.com/uploads/1/3/1/4/131453902/vajabadomowumes-futipefuparul-vinofog-besutedime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/75974252411.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/lifexuwedupobunewetitifax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/xapar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/wubupalawadodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/24024073085.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1637/files/80207342438.pdf
    • https://cdn.shopify.com/s/files/1/0449/8941/5583/files/ielts_writing_task_1_54_samples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/morris_mano_computer_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/rikeragupujiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.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_off00004cf1.bin
a00ae95b48ef153491043be5d7b75e26701f3dd2c2954e1d1ce6fb091a0953da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF1 5432 bytes
font_01_sfnt_off00005f41.bin
82bfd279c70d87a10aa453b4a4e7c564a695cd6216d3fe417b6be5495a21de40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 10480 bytes

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