Malicious PDF — malware analysis report

Static analysis result for SHA-256 04907f23a71839eb…

MALICIOUS

PDF

34.4 KB Created: 2020-08-08 13:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74237aceb8c80b160423a7264324d889 SHA-1: 307951f60dc2114b3a9b58b3b4252ef7545152e4 SHA-256: 04907f23a71839eb0fb6b255dd4bdd674dc7d56c075375a6607b3dc2c585b427
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to distribute other PDFs. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body text, though partially corrupted, includes the phrase 'Drugi svetski rat knjiga pdf' (World War II book pdf), suggesting a lure to entice users to click the malicious link. No scripts were extracted, but the presence of a malicious redirector and link farm strongly indicates an attempt to lead users to 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=drugi+svetski+rat+knjiga+pdf
    • http://files.guesthouseouassaggou.com/uploads/1/3/0/7/130775759/7b61b8.pdf
    • http://files.exploreniseko-activitycentre.com/uploads/1/3/0/9/130969183/lobamolisozebe-ruvejivafuv.pdf
    • http://files.pinkbehindthethinblueline.org/uploads/1/3/1/0/131070149/4407690.pdf
    • http://files.ww2tv.com/uploads/1/3/1/8/131872269/kewaminem-xefavafibida-xogulop-bigedoleloza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/jusupagejitunutan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/95867316126.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/roruduboxunuwosirek.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/rifobofoxurolejezotedaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/44500105055.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/86945865302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94192334972.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/nopejowenib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/lanafogabamakibezero.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/porepawaw.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049be.bin
a41dd33c39c643e2d5aaf5f7ffe9b2d31e07006fa4620e364bcddc903825159e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 5376 bytes
font_01_sfnt_off00005c34.bin
7048f0ef8eb7273d4c314d7615b97054c4dc188c5b89f25666502a24ae68ac5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C34 9640 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.