Malicious PDF — malware analysis report

Static analysis result for SHA-256 07654c4a4e524c45…

MALICIOUS

PDF

33.1 KB Created: 2020-08-24 18:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d127ba3008f93ca1b24167f0e47bf86b SHA-1: 32da344aaaf9f3b5952f8b77323b7d3c51a43414 SHA-256: 07654c4a4e524c45034e3c15c5e954b88bd12d2dba218e4bcec6aad4a529efae
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious due to its structure, which mimics a screenshot lure to entice users into clicking embedded links. The primary link, https://ttraff.com/pify?keyword=jotun+paint+data+sheet+pdf, is a known malicious redirector. The document also contains a large number of external PDF links, characteristic of SEO spam or link farms, further indicating malicious intent. The ML classifier strongly supports the malicious verdict.

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 33 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=jotun+paint+data+sheet+pdf
    • http://files.alejandrodrago.com/uploads/1/3/2/7/132740285/warisavusixej.pdf
    • http://pujarim.timothyalexandrewallace.com/uploads/1/3/0/7/130776225/542bd114c40d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/ambiente_virtual_de_aprendizagem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4598/5192/files/characteristics_of_living_things_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1345/files/seluta.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/tafunejinanororelujifised.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/nuwesisorixomagotenigus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/concept_classification_characteristics_of_entrepreneur.pdf
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/jebijoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/wokasizevuwegu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7394/files/antigen_presentation_and_processing.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7792/files/soundcloud_music_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/8915091209.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004082.bin
ebb31652e9fda21a1e7e7cefda4322510630a1e5c9ac6e2d068d92d75e76bb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4082 4872 bytes
font_01_sfnt_off0000510c.bin
b63a95bcdd9ecadc4850946e898cd71fb82785685eb654eccf697aa61520c9ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x510C 7264 bytes
font_02_sfnt_off000069bb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BB 4324 bytes

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