Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e43fbd38a1797f5…

MALICIOUS

PDF

40.3 KB Created: 2020-08-03 05:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8019bb8d803f176a990ee7871a02cd SHA-1: d3985b80bef708bd44bc96c1ef54a7f6da61c75a SHA-256: 1e43fbd38a1797f5ac4f96f174b4e9765ec938daf64356b7c848ca2a15ab832d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a common tactic for SEO poisoning or redirecting users to malicious content. One of the URLs, 'https://ttraff.com/pify?keyword=eval+command+dbm', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to host these links. The presence of numerous Shopify links, while many are benign, contributes to the overall link farm characteristic.

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=eval+command+dbm
    • http://files.lovebugweddingcars.co.uk/uploads/1/3/0/7/130738676/a0142.pdf
    • http://files.ionaabbeyandclandonald.com/uploads/1/3/2/6/132682119/4808946.pdf
    • http://files.dakotaashleymarie.com/uploads/1/3/1/4/131453365/luridaligobokaxede.pdf
    • http://files.adesperateman.net/uploads/1/3/0/7/130775413/77240352.pdf
    • http://files.ucosmicu.com/uploads/1/3/1/6/131637014/200710.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/wow_thousand_needles.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/kilebakakojezixibitaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jomanumono.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/59824282427.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/worafibatesiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/jamarivatokakope.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/38344890113.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/39000786981.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/atlanta_season_3.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_off000060d2.bin
d56c600618f841729875748948234a6128c7f324404170e5c079490e3ff67756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 4968 bytes
font_01_sfnt_off000071b2.bin
7d20b78c8fcb9c2d96d2f515d6091e95c173d614b3cd563898bf6881446f4539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B2 10220 bytes

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