Malicious PDF — malware analysis report

Static analysis result for SHA-256 026150ecdaf1efeb…

MALICIOUS

PDF

65.0 KB Created: 2020-08-08 22:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccf63dea2e2d07e8efc663887ab7557f SHA-1: 48bf0923a66a86ed1880491f899f504c931bcbc3 SHA-256: 026150ecdaf1efeb34ee67cc61971dad84f4ed3129c692e2dce29556d4920347
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link, suggesting an attempt to disguise malicious content as a technical document. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic.

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=sinusoidal+pwm+inverter+pdf
    • http://taneba.behindthescenesinfirstgrade.com/uploads/1/3/1/4/131406082/lesovutisefej.pdf
    • http://files.teacakeandgaming.com/uploads/1/3/2/7/132740327/9257101.pdf
    • http://files.susanwenz.com/uploads/1/3/0/7/130776401/wadizonefe.pdf
    • http://files.lifeaftersemicolons.com/uploads/1/3/1/4/131437980/18577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/ronaxanokukelut.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/lafavoxovorufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/83480338381.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/loser_like_me_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/lijafazajopinipal.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/85522063328.pdf
    • https://cdn.shopify.com/s/files/1/0443/0246/7228/files/diccionario_biblico_ilustrado_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/introduction_to_robotics_craig.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/gululefopatire.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/jawoxenosoxugigaji.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/40684084478.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/wizitutej.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/gegevupajenuwotedawolinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/40290529756.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac13.bin
94b3953896af4bc0d12801f3386144e140b8471729de7c76efbb32a0ac80f497		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC13 5444 bytes
font_01_sfnt_off0000be99.bin
d041746c49a9e1ae30ae85c08dffca0811fe828083689eb2138fdf2ee0aeea4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 10356 bytes
font_02_sfnt_off0000e1ac.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 16060 bytes

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