Malicious PDF — malware analysis report

Static analysis result for SHA-256 356c7d426a48a92e…

MALICIOUS

PDF

35.4 KB Created: 2020-09-01 04:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e11033be892a01946b7f9d72669ce9b4 SHA-1: b368fa420f746d4ec0d68fad4ae075a68173a34a SHA-256: 356c7d426a48a92e10ae3e7fa6150f82f470b9e4fcbe512b2a88b3e1e90c6232
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous links to other PDFs, likely to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, reinforcing the malicious redirector finding.

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/pify?keyword=dynamics+nav+format+date+dd+mm+yyyy
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/bearing_catalogue_skf.pdf
    • https://cdn.shopify.com/s/files/1/0465/0313/3342/files/digital_signal_processing_proakis_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/82483278245.pdf
    • https://static.usrfiles.com/ugd/e2c250_289500d0b0c64eb68f6a36926793115b.pdf
    • https://static.usrfiles.com/ugd/3aee12_2c9ff7b067b14864b9cc10946454f7ae.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_5a381a2995ff4de7aba7fc0875e0c48c.pdf
    • https://static.usrfiles.com/ugd/3de8a6_9f4c2147675843fbae2fb67a6036b8d4.pdf
    • https://static.usrfiles.com/ugd/6a7407_7d590fcb9c814b9da6b940d937f3260b.pdf
    • https://static.usrfiles.com/ugd/3f80ec_c86572a782f64d7a88ec2f61983902d2.pdf
    • https://static.usrfiles.com/ugd/a107db_a329510d6104461cac0e1a9ba075b1bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3887967928bd4581a8bb7ea3c48b06a1.pdf
    • https://static.usrfiles.com/ugd/82e28d_b1461e72c43f4c2fa810b676e6737719.pdf
    • https://static.usrfiles.com/ugd/9e41f0_544be1ecf6424f17a77f8b0b6e20b441.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f04377a3183477d92ef71eabb234eb6.pdf
    • https://static.usrfiles.com/ugd/de02f3_806f2755e9d64117ae940e56a0afac2b.pdf
    • https://static.usrfiles.com/ugd/6240f8_7e7e2ca0541845419d2c339dadf48381.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_off00004aad.bin
4a6528a874efd5fc27bbbf3a662e5d731963eb70892a04bbf6c5e0df0b625ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAD 5296 bytes
font_01_sfnt_off00005cb4.bin
f6ad59dd0bd99847778b2448cd39366f35f135380fd51710246f66c0265d0c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB4 10436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.