Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfa53b53f8d3653…

MALICIOUS

PDF

52.5 KB Created: 2020-08-08 09:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ae773162ade2540dbe05fd71c99641 SHA-1: cb261ba230c5a5bc0b8bb87948dd54fcf4a400ac SHA-256: 7bfa53b53f8d36538e439bf613f3efe6d10137fc17e98daa90e8593eed795fad
128 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=elizabeth+bathory+biography+pdf'. This indicates the document is designed to redirect users to malicious sites under the guise of providing a biography. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious document. The document body, though heavily obfuscated, contains the same lure text and URLs.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=elizabeth+bathory+biography+pdf
    • http://files.argonautcoffeeleavenworth.com/uploads/1/3/1/1/131163740/f1cf8426eba5bbf.pdf
    • http://files.theventure.blog/uploads/1/3/1/6/131606923/2826909.pdf
    • http://runafo.vance-smith.com/uploads/1/3/2/6/132680813/koxisuvutonuxi.pdf
    • http://files.theworcshop.com/uploads/1/3/1/6/131607075/2ba0088e.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/xasifutituxob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/77579206304.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/46868346560.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/58771920097.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/bafoxijefesavoron.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/zanusomewatijavegusufor.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/gojowodalaxovetog.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/vatipaxazaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/toxerorisiwixazonekifudub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6493/4043/files/teroguxetesuratakefokunez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000771d.bin
ff5da5ed80a59db35ab3788595443f20cfa08cff77b838098e8a0fa5ecfcc99a
pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 5372 bytes
font_01_sfnt_off0000896f.bin
3e587b63bd78cceeba420b86b0fc68db7a77a3e5505eb68812777e4dd32b294a
pdf-font-stream PDF embedded font (sfnt) at offset 0x896F 10552 bytes
font_02_sfnt_off0000adbd.bin
4c9c956035e1b35084c6f87549d47a5dda4d93aa4b9aa3c0579ecbf9e21a3250
pdf-font-stream PDF embedded font (sfnt) at offset 0xADBD 16836 bytes