Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f6e51e8df22caf…

MALICIOUS

PDF

39.1 KB Created: 2020-08-02 21:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be2b50b8fa2812d3343ebc4c0379602 SHA-1: 91fa5c827c949648dafadbb31b8a618f28fb55f2 SHA-256: 59f6e51e8df22caf8307f604dc8f7b273d6d38901c1f23741c0eb4d3a3ac8404
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF SEO Link Farm', pointing to various PDF files hosted on Shopify and other domains. One primary URL, 'https://ttraff.com/pify?keyword=forgotten+realms+interactive+atlas+free+download', is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests a lure to download further content, likely malicious. No scripts were extracted, but the link farm and redirector are sufficient indicators of malicious intent.

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=forgotten+realms+interactive+atlas+free+download
    • http://files.gabiroach.com/uploads/1/3/1/6/131637309/2466201.pdf
    • http://files.deborahmauldinlicsw.com/uploads/1/3/1/3/131381693/vekuxuvedu.pdf
    • http://files.ericscottsutherland.com/uploads/1/3/0/7/130738722/rexomedikomuv_kukemeku.pdf
    • http://files.stauntonalliancechurch.org/uploads/1/3/0/9/130969545/758928.pdf
    • http://files.chelseanoellephotos.com/uploads/1/3/1/4/131454791/nevodomil_wizewujegul_dedugipalolorol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/68032129304.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/41839882764.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/potusorazegonalaxapen.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/dojuxemanirebazubepudasad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/85475089194.pdf
    • https://cdn.shopify.com/s/files/1/0436/7784/3609/files/35014636696.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/11724061931.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/4912778253.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/edith_hamilton_mythology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/jolagekedopazuripuru.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/88451047472.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_off00005977.bin
d68fccfdc6bde3f434fc9b9736c1376e079d8429c1cd9fc76c43abbc5da0ea8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5977 5448 bytes
font_01_sfnt_off00006c08.bin
1229191eb888fe4ea136ce3807b2293dd71eeed6a8e90831ce13f48777026dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C08 10356 bytes

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