Malicious PDF — malware analysis report

Static analysis result for SHA-256 86444a70aec156d5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 14:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a696304f1a4892c379a9a5d9f2f4a4f6 SHA-1: 57b34f6ea70310471d8398b540c70da6e6612ce1 SHA-256: 86444a70aec156d5b71276d93fe30de8400c900f09f763783ecf3e8b97b80e8b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cities+skylines+guide+ps4'. This URL is presented within the document body, disguised as a 'Cities skylines guide ps4'. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cities+skylines+guide+ps4
    • http://files.wellingtonstreetartgallery.ca/uploads/1/3/1/3/131379246/ronenawulilelugow.pdf
    • http://files.maiawellnessstudio.com/uploads/1/3/0/8/130814788/lafikewatub.pdf
    • http://lumaw.annewalkerjewelry.com/uploads/1/3/1/4/131406082/4431840.pdf
    • http://tewov.aatp-mysterygames.com/uploads/1/3/0/8/130814347/27e981b01ec15.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • https://cdn.shopify.com/s/files/1/0450/9663/2472/files/ski_arlberg_piste_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/marazirexisoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52876055892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/81345746347.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/imagenomic_free_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6963/files/dujezekagosufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/gudutenot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/togugemopin.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/challenges_of_ecotourism.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/ct_bng_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/ancestry_gedcom_format.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_off00006ca4.bin
35eed636fd5235b9d80bf4f7a1559897dc2c95f55f5806890a048fd3fc819a8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA4 4980 bytes
font_01_sfnt_off00007dbc.bin
26bbb18663da8bc53c635071ecf0fcf10c10679c68afeabacf6e52ecd4cf59f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBC 11020 bytes