Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46076c03715d650…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 01:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5291969b9f8b4cc66ac067645595979 SHA-1: afcf2b90f37a9eb202591a417b800436d13a2029 SHA-256: c46076c03715d65003c040ee864cbcd40452b7b5e989eaface10d5b434f5c371
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=botulismo+de+origem+alimentar+pdf'. Another critical heuristic identified a large external PDF link farm, with many links hosted on cdn.shopify.com. The document body contains garbled text but also includes the same redirector URL and several Shopify URLs, suggesting a content-luring or SEO manipulation scheme.

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=botulismo+de+origem+alimentar+pdf
    • http://files.suemorton.com/uploads/1/3/2/7/132740519/xetenupugefodur_gadofuvojor_piwixitel_merop.pdf
    • http://files.a1a-live.com/uploads/1/3/1/8/131871740/2923420.pdf
    • http://files.loyandrus.com/uploads/1/3/2/8/132815003/591fee305e.pdf
    • http://files.stalbansepiscopalhouston.org/uploads/1/3/1/4/131406269/jexom_puduwitovade.pdf
    • http://mobudadi.juanpassadore.org/uploads/1/3/0/8/130814328/guzulil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6133/8531/files/bamipigimowovomebadawum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/29069660497.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/50421166070.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/81184187260.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/babigibesokabewufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/38406917966.pdf
    • https://cdn.shopify.com/s/files/1/0438/0747/3821/files/occupational_personality_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/31055143439.pdf
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/givorodopowosafiveg.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/final_fantasy_ix_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/81823364500.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006032.bin
b229540f27a56d65ec010b1de1d53ea16f437b032be81067b2afff27137ff6ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 5292 bytes
font_01_sfnt_off00007213.bin
aba9ddd943e1f64a54b831b4b9f15eaa8893fc4d10b214414a71d49668617627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 12480 bytes
font_02_sfnt_off000097da.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DA 4324 bytes

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