Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46ed6da89236d40…

MALICIOUS

PDF

41.3 KB Created: 2020-08-17 13:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e832fb25e27838fc6da563742aca8a7 SHA-1: b2c501ea9a2340132380898b88feb34e10d9a7a4 SHA-256: c46ed6da89236d4009dafdb4fa4a257b7eb818c09a5e75d731e4822ef6f5559b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF as malicious with high confidence. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=handprint+turkey+template', which is also flagged as a malicious redirector. The presence of a large link farm suggests an attempt to distribute malicious content or phish users.

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=handprint+turkey+template
    • http://files.helpmealison.com/uploads/1/3/1/8/131872079/mefaguzazovema-fabegel.pdf
    • http://files.thebeaverracing.com/uploads/1/3/0/7/130776164/614965.pdf
    • http://wowafevub.drdavidmurphy.ca/uploads/1/3/1/3/131383483/bde5cd.pdf
    • http://files.nicolophobiaphotography.com/uploads/1/3/1/4/131409442/2032015.pdf
    • http://files.chapel-associates.co.uk/uploads/1/3/2/7/132740498/lariguboxesodefukibe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/pdf_splitter_and_merger_software_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/20487901441.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/25587297591.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/35138781327.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/niliriro.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/nupikalewijalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/mewumozelajukuvofupil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/jizowuvukot.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/menafalotasaturifaxifun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/vugibilimojajevafafokajif.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_off00006450.bin
cfa5aca11d3763eac83b4f86ec5897b63987dd8124dc273a10d3712d0fc573bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 5056 bytes
font_01_sfnt_off0000756d.bin
f1619c5d12edefdf58a2751d508c8d9defc9e18cf113403fa1afcad7b4b44ea6
pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 10180 bytes