Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e222f36502f5ad…

MALICIOUS

PDF

52.0 KB Created: 2020-07-09 23:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb224a2561734e1d704f1600577eb29c SHA-1: 76e8199e13894a665d01d8d727b831e737ae40a8 SHA-256: 31e222f36502f5adbacd82323c1a21b939adf5f9cba566984569b5439b705a09
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is further disguised by a search query for a medical textbook. The presence of a "download button" heuristic suggests a lure to encourage user interaction with these links. No scripts were extracted from this sample.

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.ru/wb?keyword=kasr%20el%20aini%20introduction%20to%20surgery%20pdf
    • http://files.thebroomclosetmemphis.com/uploads/1/3/0/9/130969993/dimunodut_verovuje_jiniremibi.pdf
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • http://files.newsotterleeproject.org/uploads/1/3/1/4/131406606/mupakulozik_mopasesiw_jezelibo_benotekefufaj.pdf
    • http://files.randrpressurewashingllc.com/uploads/1/3/1/4/131452870/dapaze_fusobilu_bipudajawe.pdf
    • http://files.oakislandhomeowners.org/uploads/1/3/1/4/131406982/7443262.pdf
    • http://files.canalsigling.com/uploads/1/3/1/3/131383018/8717392.pdf
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.elizabethrvann.net/uploads/1/3/0/9/130969884/3280599.pdf
    • https://forivugovov.files.wordpress.com/2020/06/37725913440.pdf
    • https://pegepev.files.wordpress.com/2020/06/jigoxadi.pdf
    • https://rexiduzaxiwu.files.wordpress.com/2020/07/gujovonoxezeze.pdf
    • https://zoxuwij.files.wordpress.com/2020/06/41242482704.pdf
    • https://bovurejevo984565953.files.wordpress.com/2020/06/31457016027.pdf
    • https://biloxes.files.wordpress.com/2020/06/savat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22511335110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56697352128.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_off0000851e.bin
a67839f9358dbb4bced59bf959691a4bdab6409e277c6394a350845758ed34c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x851E 5276 bytes
font_01_sfnt_off0000972b.bin
332323cd7009c7a64de7de44514d99309fc558f377d2d958dfbadaf621ef2a35
pdf-font-stream PDF embedded font (sfnt) at offset 0x972B 13792 bytes