Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeddaa441fb029b…

MALICIOUS

PDF

40.4 KB Created: 2020-08-20 12:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d45f0876476e7c806aa8c219bbd73e78 SHA-1: d704c2229a99be85dec97cae416a7ac1fc924806 SHA-256: 9eeddaa441fb029b09e5c249979cbe6acad39dcfad99edffcbf8088348b067b0
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a prominent URL that matches the redirector link found in the heuristics. The presence of numerous embedded links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=listening+answers+of+creating+artificial+gills
    • http://files.diana-oasis.com/uploads/1/3/0/8/130813639/6408387.pdf
    • http://dizorutu.swpay.uk/uploads/1/3/0/7/130775897/todalowelerame-fusidik-lijinanibib.pdf
    • http://safutarol.callihanscache.org/uploads/1/3/0/8/130814328/900dd52.pdf
    • http://files.heywoodracing.com/uploads/1/3/0/7/130775363/gakipazukaka_mesebepu_xiwapisisitug.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/codex_basiliensis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/4471240391.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/automatic_stirrup_bending_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/2149/9548/files/botilesilixarulaniparawoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/bupeki.pdf
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/poxazisatojojow.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/windows_api_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/degogutobaxodojodezovu.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_off0000607b.bin
aec8b6a48bcd2b5062435f8cd44c1c990c620cb877bebd71b3309c02a56cce3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 5084 bytes
font_01_sfnt_off000071e4.bin
4ec82496341ca7be42eed1b894279c7a2c7a4153165644ba4e63c92cdfda9b45
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 10212 bytes