Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedfc0a2c806e950…

MALICIOUS

PDF

50.8 KB Created: 2020-08-22 23:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39bec62e6c65b305e4b5b4fb8767251f SHA-1: 310a77359b784c96adffc90e495e918281202199 SHA-256: dedfc0a2c806e950cd93b4568da760690766a2f4583cf55908c56cbaf8e3fb6b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body text, though partially corrupted, contains keywords related to the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=punjabi+movies++sites+list+2019
    • http://malok.travelwithsouthwind.com/uploads/1/3/0/7/130739046/xoximuke.pdf
    • http://files.weststormontwoodlandgroup.org.uk/uploads/1/3/1/0/131070894/2a976b3.pdf
    • http://nosatuw.thesweetwhiskboutique.com/uploads/1/3/1/4/131408229/3460388.pdf
    • http://wonexo.kkphotography.com/uploads/1/3/1/4/131409090/4892290.pdf
    • https://cdn.shopify.com/s/files/1/0440/3966/7877/files/94539152869.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/55130553046.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/vivimagufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5693/9676/files/zalawisimiwikaxafimilerod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/fault_lines_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/99269449377.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/putew.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/zeniked.pdf
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/demiberakiranuxariba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/47795316818.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_off000073c9.bin
1596b0b51756001816c8aa81ae3ff452d71e6baf63b2259c677088c9fa376cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C9 5492 bytes
font_01_sfnt_off0000866f.bin
b57609d61cde676b88f10d7910de6d98bda2013e446aab4e5b30b25d9a0030de
pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 10080 bytes
font_02_sfnt_off0000a924.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA924 16164 bytes