Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3b66b490894249…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 02:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c7e7f678f5bcd36d9ec458185482d76 SHA-1: 3dd2924e81e486f2eda3311b5d40f80cfc011a99 SHA-256: 9c3b66b490894249cfd0402c9381925f63e6904b0bde3d728080c29be9a4d094
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, including a redirector to a malicious domain, indicating a link farm or redirection attack. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=security+risk+assessment+pdf', suggesting a lure to a malicious site. The presence of multiple Shopify-hosted PDF links further supports the link farm heuristic.

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=security+risk+assessment+pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://files.stfcfoodnetwork.org/uploads/1/3/1/1/131164488/bab8837ce25028.pdf
    • http://files.photosbacktolife.com/uploads/1/3/1/4/131453268/xaxifikeba_tumujajalopejub_kemurewagoxux_vebuwuxovozuf.pdf
    • http://files.wedoliabilityinsurance.com/uploads/1/3/2/6/132682868/7794993.pdf
    • http://rezifowo.annawinkowski.com/uploads/1/3/2/6/132681670/1217016.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/4793014392.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/dexuzetozamufonewilikozi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/godovuwavagonusodufaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/lariwib.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/35878563109.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/91501364877.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/jingle_bell_rock_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/56803367370.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/historia_de_la_bandera_de_panama_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/tilaremufuzovesike.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/24562361079.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9781/files/mcdonalds_uk_menu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/xepajafamogenixubaf.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_off0000719f.bin
a4ff6915f88d7ae8c035fe39ae4698e2b418178d772e3576261091b160f6991b
pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 5540 bytes
font_01_sfnt_off00008473.bin
87a0981657d6beac98167094e1a8f566c53c27a1a37d067ef03674fe44b7c1cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 9856 bytes