Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce84c8ddd7df697…

MALICIOUS

PDF

51.8 KB Created: 2020-08-06 15:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efda5c7bc52bfbb5958fa4a17601d74c SHA-1: 7c25083fdcdde6c7d934b37c282d869f0356bff1 SHA-256: bce84c8ddd7df69763e482be7c633ef20e68cfa707ad7314d1ee95fe58aecfea
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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.com/pify?keyword=obstacle+avoiding+robot+using+ultrasonic+sensor+arduino+pdf
    • http://files.splashdogwashing.com/uploads/1/3/1/4/131452903/dijanipo-towiraz-butame.pdf
    • http://files.luludisoap.com/uploads/1/3/1/8/131856456/munevomixajev_tadafaz.pdf
    • http://files.greenapplegarden.org/uploads/1/3/1/6/131636737/5995150.pdf
    • http://files.zwanzigerrealty.com/uploads/1/3/1/8/131871692/fegiwi-juzipivabo.pdf
    • http://files.zwanzigerrealty.com/uploads/1/3/1/8/131871692/fegiwi-juzipivabo
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/23842711604.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/vivegagimezumobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/fuminaxav.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/2866949505.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/gonuvirewemixomuvovinugev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/rasex.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/republica_aristocratica_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/jiwuvufasamososudux.pdf
    • https://cdn.shopify.com/s/files/1/0439/2956/7387/files/tovamirazolunipufonifar.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/5220232614.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/make_smaller_illustrator.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_off000064d5.bin
edd644f70dbc08be8f48b52993729a05121d4c2f5c8c3dd7597b27515d0fa50c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D5 5548 bytes
font_01_sfnt_off000077c0.bin
58d130861e2caf78908c1624cad5b0c347aaa98d2fd4376b1a373693c79f516c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 14536 bytes
font_02_sfnt_off0000a612.bin
729fd743170d0950bc0d2f4df117cad9e3b186df9a3ec68adddadf6d6f3c8ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA612 17020 bytes

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