Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47567faeef1be21…

MALICIOUS

PDF

34.2 KB Created: 2020-08-20 08:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb38fc9f006a88b4ae2214434a0e26c4 SHA-1: 6b2ffbfe81c664b05da6d23e73e740689b2ffce8 SHA-256: d47567faeef1be215ae81dc30f9761b5ec27ea3c643e74bc7f2b96c18db10b27
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `ttraff.ru`. The document body, though heavily obfuscated, contains text related to 'Avantek amplifier datasheet' and includes the same malicious URL. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to disguise the malicious redirector. The primary intent appears to be directing the user to malicious infrastructure via a deceptive link.

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.ru/pify?keyword=avantek+amplifier+datasheet
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdf
    • http://files.yourstrulyka.com/uploads/1/3/0/7/130740217/nejusevebanik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/fosumutodaxaximefujelib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/xuluxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/mulufopawerokojuzanewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/53612339252.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/24477076733.pdf
    • https://cdn.shopify.com/s/files/1/0437/7097/0274/files/xujivituraxuwapolunizapew.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/gimme_shelter_chords.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/attestation_de_vente_d_un_terrain.pdf
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/jejupemita.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/vopetepiwedaperemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.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_off00004832.bin
decd73865cff1dc3db5c40537c8c276402375f664e6ed66a4e6167f7e1f50f3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4832 5392 bytes
font_01_sfnt_off00005a63.bin
5b9dd93c905fc6f214d1f705761d3bb634979cfa7b3e9a15e1d08bb2bdac1e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A63 9956 bytes

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