Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acaeca396476046…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 22:28:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7adb0e53a27dec03f3ee6dac2db9737e SHA-1: b0fe9951dafc46cddf8688a57edc236fc560c442 SHA-256: 7acaeca396476046b7d6ea858b97702a3d454ec99896527763f60812ba0b7d79
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body text, though partially obfuscated, includes the phrase 'Vergiftigingen informatie centrum' and a URL that appears to be part of a link farm. This suggests the primary goal is to redirect users to malicious or spam content, potentially for phishing or SEO manipulation.

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.ru/pify?keyword=vergiftigingen+informatie+centrum
    • http://files.holysoulschurch.co.uk/uploads/1/3/2/6/132681409/pofumamon_pekifepogexosux_fuvawalejulete.pdf
    • http://xifuvibu.pinkdreamz.com/uploads/1/3/0/9/130969192/9586156.pdf
    • http://files.stjohnjeanerette.org/uploads/1/3/1/1/131164159/c828c00e02.pdf
    • http://files.manorfieldspark.org/uploads/1/3/1/3/131383544/voxitifunezasa.pdf
    • http://degap.masonmansungkang.com/uploads/1/3/0/8/130813604/cfa4e8819a179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/bubble_sheet_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/28155948864.pdf
    • https://cdn.shopify.com/s/files/1/0440/4979/3189/files/java_se_7_update_45.pdf
    • https://cdn.shopify.com/s/files/1/0448/4956/1757/files/covermymeds_prior_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/16945362872.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/tewak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/a_level_computer_science_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/90298090420.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9597/files/kasakega.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/balanced_polymorphism.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_off00006246.bin
5c4cdc6a6e1d255f4326e333533e8be292f457fe132a0178a0fc8b3d20042ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 4956 bytes
font_01_sfnt_off0000730e.bin
78e949e4faf2838e277b09d2a64b7b4963f41f3a5f493580e03a0840050f8d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10464 bytes

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