Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fae054aa207f05a…

MALICIOUS

PDF

49.7 KB Created: 2020-08-22 04:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08e58b75a83140d86f5eb07a37290283 SHA-1: 064bc94ee070affe49f97db235ae70fda8ab6427 SHA-256: 3fae054aa207f05a55806265c31730f8d6fe2e294cb2fd3a101589a3b6f398f8
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'urine ketone bodies test' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=urine+ketone+bodies+test+manual+procedure
    • http://files.apsleepingindianhemp.com/uploads/1/3/1/6/131637553/xofotimojokigan.pdf
    • http://tupagudo.mgle-germanschool.org/uploads/1/3/1/0/131070674/mazujob-pabivufokuxa-xukadopug.pdf
    • http://files.instapreneur2020.com/uploads/1/3/0/7/130738799/0a0fafca1950c7.pdf
    • http://files.hagiazo.net/uploads/1/3/1/8/131856129/43335cb3b12.pdf
    • http://files.glacierbaysportfishing.com/uploads/1/3/1/3/131384573/5a76e9b3.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/nelajixofilevufamejuvaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7327/files/50230601759.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/my_talking_angela_free_game.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/dragon_age_inquisition_walkthrough_guide.pdf
    • https://cdn.shopify.com/s/files/1/0458/6579/5737/files/ashrae_psychrometric_chart_sea_level.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/jameson_capitalismo_tardio.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/34588605670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/the_texture_of_renaissance_music_is_chiefly.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/96786679362.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_off000071d2.bin
51e95a840eed43ace9fbcddb76c0d8a031acabed6e1f6c959ab66ea4091413c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D2 5416 bytes
font_01_sfnt_off0000841a.bin
aeb0e59e0679a9d558cd6c3639fea791c99ed34335614bb88d0b414683cdceea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841A 12892 bytes
font_02_sfnt_off0000ad5d.bin
83eb65b6b36d467b5c0a5a13ec5e6cf9148dada1cd113b3222dbb2af960d471e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5D 2956 bytes

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