Malicious PDF — malware analysis report

Static analysis result for SHA-256 890f25ab67ad72f6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-11 22:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c70217bd87f66eddece823eea4365eb SHA-1: 830148d4b5bf072f1ee6fa70aa5e504ea200de6f SHA-256: 890f25ab67ad72f68bb950ab26fe7c137d4103e292573c5e771291510a6ff97d
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to a handbook download, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute malicious content or lead users to phishing sites.

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=the+cardiac+catheterization+handbook+5th+edition+pdf+download
    • http://files.mayadayal.com/uploads/1/3/2/7/132740445/5897162.pdf
    • http://files.rosedalehorseshow.com/uploads/1/3/0/7/130776182/wogatavaxosav.pdf
    • http://files.davidsblakeslee.net/uploads/1/3/2/7/132740541/5778558.pdf
    • http://files.pediatricspeechthpy.com/uploads/1/3/1/1/131163718/jovogavemusezowilune.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/kibeboxijurej.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3745/files/chapter_13_physical_and_cognitive_development_in_early_adulthood.pdf
    • https://cdn.shopify.com/s/files/1/0451/0502/1091/files/etiologi_jantung_koroner.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/99155520231.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/handboek_bouwbesluit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/zumusatupipixafiwez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/ronoriviverawajugimarape.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/96321039933.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/81484355309.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/zikopumuwupibikusetepig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9799/files/kujozogi.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_off000058c7.bin
a27ec405a59f767dd8e436e4fd30a8bceff41f2b8c72363a4da503f48e7e37d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C7 5272 bytes
font_01_sfnt_off00006ac3.bin
8363cf628919e1ae2299eb9eda3d2139e4d172154b9bc9dbca6fd50db8d378cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC3 10616 bytes
font_02_sfnt_off00008f12.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F12 4324 bytes