Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e0d0f75c4627e8…

MALICIOUS

PDF

42.9 KB Created: 2020-08-08 22:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63795c3599e9e625bd511b989c861d9 SHA-1: fa09cdb662155f422190192769eb9f608bd39a25 SHA-256: 48e0d0f75c4627e826fe87a8cba1631d81aadc7d2bed8bc8a38c1cb1c1806b1f
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 external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One prominent link directs to a known malicious redirector at https://ttraff.ru/pify?keyword=antas+ng+wika+worksheet+pdf. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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=antas+ng+wika+worksheet+pdf
    • http://files.graemesteelejohnson.com/uploads/1/3/1/4/131407552/bf387cda384ee.pdf
    • http://files.villageyogayogi.com/uploads/1/3/1/3/131398236/gajufezugozolivi.pdf
    • http://files.dlake.net/uploads/1/3/1/4/131483445/xekav-bakinoxerexasak-vekatusufi.pdf
    • http://xegon.worldclasslanguagesolutions.com/uploads/1/3/2/6/132696111/3618061.pdf
    • http://files.roamingsitters.com/uploads/1/3/1/4/131453429/gonon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/lafutubosotepuxutalamugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/53650350657.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5555796470.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/modasawigir.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/luwarejuzarorobope.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/wow_classic_blacksmithing_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/97832161332.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/30531312014.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/dafexomoterapevajibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/86663367151.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/napagevedekobepowawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/88667545303.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/characteristics_of_organized_crime.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_off000060f1.bin
62f3b8c306ce33b3c9cb54554d5206aca6aeb621182e99deb75e59d66163c8e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F1 5416 bytes
font_01_sfnt_off00007367.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7367 1800 bytes
font_02_sfnt_off00007bf5.bin
106ffc71b0ae704d65e9a993b15118b7688ea767d2b22ec96298bb910f5e2d7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF5 10024 bytes