Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6b7a89ffd30608…

MALICIOUS

PDF

35.6 KB Created: 2020-08-30 08:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1eded29a7d63e7d9b0e872deb060ff1 SHA-1: 6f2b272c7141e8abd40482a028b5e5784ab41b9b SHA-256: 6c6b7a89ffd30608ababb4c8766b347131bd7051e3b041f5f76d5ca84bdfaf4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of the malicious URL indicates an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

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/wix?keyword=dna+structure+and+replication+worksh
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/91285195220.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/rareraturabiviwowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/totawopajezolit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/regulation_of_cell_cycle_and_cancer_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9338/3585/files/31561814819.pdf
    • https://cdn.shopify.com/s/files/1/0448/3599/5808/files/bendix_acom_diagnostic_software.pdf
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/nds4ios_pokemon_rom.pdf
    • https://cdn.shopify.com/s/files/1/0452/2449/3213/files/9742942184.pdf
    • https://static.usrfiles.com/ugd/b8c837_a17e330b4a9c422fb9b634a2ac92d295.pdf
    • https://static.usrfiles.com/ugd/a18aa6_1647dbb190bf4f638724c9cb0fc39861.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/diwifadaridexorajibimudep.pdf
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/vilel.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/abdominal_trauma_radiology.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d88.bin
acde947d0d9f4495472725e17dfe81e7d4278bebedf96f5e863e1ad76272c3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D88 5316 bytes
font_01_sfnt_off00005fa6.bin
8ce6585a1b5eb3849e67a9523e7bafa4ccfce9aeccfd25f0a25607b4edcd2d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 9968 bytes