Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc898934368a262…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 21:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52a8b1e612c78092ea56fc03eddd488 SHA-1: 6062a88b1c6a0c197772576bdce7717e662a35bb SHA-256: 9bc898934368a2628882b90c5e49eebe2b60efbc69113e7f46204fe750b2947d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bluestacks+1+free++for+windows+8.+1'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking. The PDF also exhibits characteristics of an SEO link farm, with numerous links to other PDFs hosted on various domains, including 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=bluestacks+1+free++for+windows+8.+1
    • http://files.melissalamoureuxlmft.com/uploads/1/3/1/0/131070912/2f0510cff.pdf
    • http://files.thebookcatchers.com/uploads/1/3/1/3/131398477/6161505.pdf
    • http://files.aauindiana.com/uploads/1/3/1/6/131637362/vaben.pdf
    • http://files.churchcom.solutions/uploads/1/3/1/3/131382808/60c41c.pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/bakutomim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/71611481979.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/free_lsat_logic_games.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/wefamigabarenonubiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/zosodofafogulukewupafinad.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/45825024213.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/budget_2020_vision_ias.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/5347521895.pdf
    • https://cdn.shopify.com/s/files/1/0449/7873/3224/files/sharad_upadhye_rashichakra.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/pathologic_basis_of_disease_9th_edition.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_off000060fa.bin
1081196b9524d0d7d65cb9003ec446aa84b875d09327190d223a69466dbcedb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 5500 bytes
font_01_sfnt_off000073d4.bin
f45e719126bdabc4595a2fc297091bb202e5ea8de941577c6fff3881a9623fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 10680 bytes

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