Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35529af8a8dcb06…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 06:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9c9391e6524b702e884b45a69003e1 SHA-1: 32af4f33c8cc10fe66759897f9fb03941c8cee94 SHA-256: c35529af8a8dcb06373e7ee9bb0a3ffe6417d3611532bc8a24f83836446d907b
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body text, though obfuscated, includes the target URL 'https://ttraff.ru/pify?keyword=el+paso+police+department+file+report', suggesting a lure to disguise malicious redirection. The ML classifier strongly supports the malicious verdict.

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=el+paso+police+department+file+report
    • http://files.jaspercountytiochcommunityassociation.com/uploads/1/3/2/3/132303041/rekefunafovamaxise.pdf
    • http://lugax.ourprimeproperty.org/uploads/1/3/1/3/131379789/472f5f88fad4c.pdf
    • http://files.timhoustondesign.com/uploads/1/3/1/3/131379759/rikojixaja_mepuxabumi.pdf
    • http://files.healtheducationforteens.com/uploads/1/3/2/7/132740327/tiserujovabukareje.pdf
    • http://files.willowbycommunityleague.com/uploads/1/3/2/6/132681426/7b401f74.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/parliamentary_procedure_basics.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/g_eazy_random_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/duvofesitinomamozilof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1226/7937/files/76078191069.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/duzikidisija.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/25024966480.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/kalivowiwesoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/82003621336.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/aperture_magazine_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/information_systems_research_author_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/jaxomifobujam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/gepuxuzebiwerajem.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_off000062f1.bin
868a36aeeb77345a84ce3a78ca5b5e7300c884f2278129da919ba2e969f5e5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 5044 bytes
font_01_sfnt_off000073f1.bin
6efc1874af7d0c88204e3ca610ed281e4e4de9b28b5bcd06e76b20151212878b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 10836 bytes
font_02_sfnt_off000098b7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 4324 bytes

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