Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5372c946182e4f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 18:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7b92bb508cb4617953d39f52e47570d SHA-1: e616ef47003f2b6f052acb52aaf660d5547f44af SHA-256: 7a5372c946182e4fbcf33dfe1d2df3310fb9b2e7f395685158b0639fbff4d47d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains references to the Calgary downtown map and the redirector URL, reinforcing the lure.

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=calgary+downtown+map+pdf
    • http://files.getagripmarine.com/uploads/1/3/2/7/132740445/ritidax_sofisu_rinafotoxu.pdf
    • http://files.retreatsinbeing.com/uploads/1/3/1/3/131384539/javepagexu-dojov-lenigexuluguwud-wuwutukanu.pdf
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.pdf
    • http://files.ligonierhighlandgames.org/uploads/1/3/2/8/132816036/ed36859012d.pdf
    • http://files.pageflicker.com/uploads/1/3/0/7/130738970/dejilololuvino.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/jobagazetepero.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/29576630870.pdf
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/best_pathology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/22927631931.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/tusosibefijat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/bank_po_syllabus_free_download_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/44552723389.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/fediripapiruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/faa_far_91.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/61523531259.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/18961814484.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/accounting_warren_reeve_duchac.pdf
    • https://cdn.shopify.com/s/files/1/0432/0473/9232/files/basic_concepts_of_networking.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_off0000632c.bin
1084cc9bcf15d7929adba5df3b4aa36db3014e7127519b18944927ece513c111
pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5280 bytes
font_01_sfnt_off00007524.bin
2232c2729cf6ae91ec948f0eaa3eb9a15444a041fd2ef4095a663776ef56ab9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 10856 bytes