Malicious PDF — malware analysis report

Static analysis result for SHA-256 369083694d258424…

MALICIOUS

PDF

77.1 KB Created: 2020-08-30 13:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3979f4c186e60dfef8d26f2534e25b58 SHA-1: f2f8f2ce002866f005cc51178ce5c57dac6c356d SHA-256: 369083694d258424def7e1eded36059faabc8da42196fad7c64de847187fab7f
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with multiple external PDF links. The primary malicious URL identified is https://ttraff.club/wix?keyword=doraemon+final+ending+manga, which is likely used to lure victims into downloading further malware or engaging in phishing activities. No scripts were extracted, limiting the analysis of the exact payload delivery mechanism.

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.club/wix?keyword=doraemon+final+ending+manga
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/67821511987.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/nukolebuzarapoluvinivaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://static.usrfiles.com/ugd/b8c837_107871a511b54473afb38051ef128d10.pdf
    • https://static.usrfiles.com/ugd/8b97dd_9676b65eac294cd6a6798e2fc9444419.pdf
    • https://static.usrfiles.com/ugd/b8c837_508aafb656344a2093ff5888340e3bec.pdf
    • https://static.usrfiles.com/ugd/c836c3_d8f0dbb0bd894853a0a6f543476c4fcc.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/tewoluripevun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/fisenofizibinedu.pdf
    • https://static.usrfiles.com/ugd/12745a_9873aa5686484ee39d43445886fa2a05.pdf
    • https://static.usrfiles.com/ugd/b8c837_5428e0bdcff242df9558c1964139c32d.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
stream_004_off0000a838.bin
6e1aa8a108d1b3ddbe86723030865199948f997ae36f25ab531e299ebc25982e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA838 22436 bytes
font_01_sfnt_off0000f00b.bin
993505ffb35d450b0143cc8f93d8ba5a2ee720da06971954846bba968105329e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 5048 bytes
font_02_sfnt_off0001011f.bin
fb6d9745303b1d15cdae513a6760552af96a2c8994d30e613034584fa85be3ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 11224 bytes