Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b67235031acb16e…

MALICIOUS

PDF

36.1 KB Created: 2020-08-29 14:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f1f24cd8bcc87ec69ba119a43d4867 SHA-1: f980564c575ae226e5ea3633dae64a62940deacc SHA-256: 7b67235031acb16e0a783cd5616d1ab810f3abf5887250bfdcbad3c389a3aaf8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a malicious redirector at `https://ttraff.com/wix?keyword=pomeranian+puppy+for+sale+nc`. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The document body, though heavily obfuscated, contains text related to the puppy lure and the malicious URL. The presence of embedded links and the ML classifier's high confidence score indicate malicious intent.

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.com/wix?keyword=pomeranian+puppy+for+sale+nc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/66719799824.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/99862189679.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/20279175988.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0464/8216/1832/files/neduve.pdf
    • https://static.usrfiles.com/ugd/b8c837_9af0223be4134b44aeaca6abddd61bdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a480db81ee24879ab0aba89d351fa2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_31301d09ce16491a85013ce73f17303e.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_788c613a973d4ac3ac292811cdfbfdce.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/ejercicios_de_alcanos_alquenos_y_alquinos_para_resolver.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/vivomabi.pdf
    • https://static.usrfiles.com/ugd/a76634_e1a4b63c2d9f4ecc8247d382ace017c5.pdf
    • https://static.usrfiles.com/ugd/3649d2_0de48132c81b44489cbf4c3ea1bde327.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_off00004fa6.bin
935f477181a3ed617ffc5e0bb6a145eb9be6d5bac229191c835ad12521ae9b38
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA6 5264 bytes
font_01_sfnt_off00006178.bin
8e530a12bb03c590c165e6a1009d6c78d6a7d2861288fc7d2f4c2e781d652f81
pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 10076 bytes