Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcbc9f291c22df9…

MALICIOUS

PDF

52.6 KB Created: 2020-08-13 22:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6db4c2566806934ba10b76d4945eb90b SHA-1: f20a6cfc679368877bde999f15dc9e9c5dfea420 SHA-256: 9bcbc9f291c22df9cd1073a5a8034bc759c91cb1f7fb733aec9b61fe8e580bf9
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=script+handwriting+practice+sheets', which is flagged as a malicious redirector. This suggests the document's primary purpose is to trick the user into clicking the link, likely leading to a malicious download or further compromise. The presence of a 'download button' heuristic further supports this social engineering tactic.

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/pify?keyword=script+handwriting+practice+sheets
    • http://files.skimoeast.com/uploads/1/3/0/7/130776264/5461421.pdf
    • http://fozejeko.alaskarvadventures.com/uploads/1/3/1/1/131164243/7b327d.pdf
    • http://files.nwtmta.org/uploads/1/3/1/4/131407977/firenizilegudiko.pdf
    • http://files.xnews.blog/uploads/1/3/1/4/131453232/9fedaec12f9ac21.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/36108896733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/23377835038.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/54540720182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/18757159375.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/jorujosujogeva.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/guideline_value_for_survey_number.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/online_games_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/81293638852.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/barcelona_arsenal_highlight.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/xitavixupajuvado.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/42021771806.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/68222794923.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_off000086f3.bin
d3d0bbbcf419fea50b8e690d0141502b4834cf5727880405f2ad6a329b7d3347
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F3 5496 bytes
font_01_sfnt_off000099aa.bin
927b3f473afbb04894efdc90321b82629debd07b2b1d1804e2a34fb84c336125
pdf-font-stream PDF embedded font (sfnt) at offset 0x99AA 13556 bytes