Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88b0b5df4e68438…

MALICIOUS

PDF

40.9 KB Created: 2020-08-12 08:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98ceae6fa1cb6cc86445c3af589ec407 SHA-1: 995ecc7d314a84571b9082b12edf6350d74e885b SHA-256: b88b0b5df4e68438e522b5dee3c7590fa96f7a625155a3e2812636ff06788d1a
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, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the text 'Business plan sample for supermarket pdf', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

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=business+plan+sample+for+supermarket+pdf
    • http://files.doaprowrestling.com/uploads/1/3/1/4/131438069/sipebetujarap.pdf
    • http://files.ecigsuperstores.co.uk/uploads/1/3/0/7/130740165/wexipaw_dakebanosuxulak.pdf
    • http://files.ontariochristianchoir.com/uploads/1/3/1/3/131380126/12d19829d0.pdf
    • http://jagaka.antoniojuliolopezcastro.com/uploads/1/3/1/4/131453194/xodiba.pdf
    • http://files.allangelschurch.org/uploads/1/3/0/8/130814466/nenemil.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/kokefor.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/995703755.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/alfabeto_italiano_per_stranieri.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/lojosalotefuwomed.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/66698220471.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/56429753100.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/sesojugaxumakegolibek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/black_body_radiation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/warcraft_3_nocd_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1447/files/12798354043.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_off00006144.bin
020a6ae9ad50726478a356772a470d27813cdf6819a029a5ca4d2ed8b0fff1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 5300 bytes
font_01_sfnt_off0000732e.bin
5a67e12be2146ea080505bc2cd3c8ac369ce704fbbd092d6b98770ad43b6c1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 10424 bytes

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