Malicious PDF — malware analysis report

Static analysis result for SHA-256 350fb211c09dc262…

MALICIOUS

PDF

33.1 KB Created: 2020-08-02 06:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fbd939da6a70570297811e78ccd0c8c SHA-1: 4dea6b761418f00d6f4f48c3d584651da2b4f031 SHA-256: 350fb211c09dc262ae5d993a5cec52de2a7fd9a55897cbcfdee814e1a9c661d0
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary redirector URL identified as malicious. The heuristic firings indicate this is a malicious redirector and a link farm, suggesting the document's purpose is to lure users to malicious sites. The ML classifier strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=julion+alvarez+mi+mayor+anhelo
    • http://files.pldpaws.org/uploads/1/3/1/1/131163898/sekelonifege_tupisijanuwaw_zuzaxojefenus.pdf
    • http://files.azzacafe.com/uploads/1/3/2/6/132695258/wupabafap.pdf
    • http://files.goldenbayatc.org/uploads/1/3/1/4/131453252/4150398.pdf
    • http://files.drosophilaevolution.com/uploads/1/3/0/9/130969577/2538836.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/91328116468.pdf
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/xagulemi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/78578157127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdf
    • https://cdn.shopify.com/s/files/1/0437/3803/8423/files/vumivevopenetiparetati.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/50079405531.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/wanijap.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/fl_studio_nexus.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/najefivowibataranowan.pdf
    • https://cdn.shopify.com/s/files/1/0436/9648/8613/files/85777018206.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/love_dont_change_lyrics_jeremih.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/95899579110.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/37169013681.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000468c.bin
19199a1569405b5c67ff49cbdacd49e1ffe35772840c45bd9553d25e4f9af654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468C 4948 bytes
font_01_sfnt_off00005748.bin
6f8417637e53472aa2be78931c255a03bc0ae74471070929a8d7c825bfefaa8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5748 9460 bytes

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