Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37f54567d4a70b7…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 16:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee244f03aa921ffbff291d20fec71da SHA-1: f58bf35be573f47b466b68a9174b8b8c9c044c6d SHA-256: f37f54567d4a70b796d9bc8840dac9b01799bd9fdaa90cd005b901442c6d66d2
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is `https://ttraff.com/pify?keyword=ley+de+alimentos+transgenicos+en+el+peru.+pdf`, which is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, also contains references to this URL and other Shopify links, suggesting a lure to download further malicious content.

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=ley+de+alimentos+transgenicos+en+el+peru.+pdf
    • http://files.store.easy-editor.com/uploads/1/3/1/3/131384771/6195886.pdf
    • http://files.mdkavanagh.com/uploads/1/3/1/1/131164236/8e223ae25561.pdf
    • http://files.fujimountainguides.com/uploads/1/3/1/4/131437491/1092218.pdf
    • http://dspace.unitru.edu.pe/handle/UNITRU/4297
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/fepamome.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/96407995034.pdf
    • https://cdn.shopify.com/s/files/1/0439/7219/8558/files/65942453486.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/gulerigis.pdf
    • https://cdn.shopify.com/s/files/1/0451/2507/5109/files/graphic_novels_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/physical_chemistry_mcquarrie.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/python_download_image_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/principles_of_quantum_mechanics_shankar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/25580320527.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/farefebobon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/71975011765.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/center_of_gravity_formula.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_off0000748a.bin
719ffa2dc1735da30fdc54c4488ecf387207817f6cb3c809861a970f9f37dbc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748A 5552 bytes
font_01_sfnt_off0000876c.bin
70755201fbed74d80d2364a84723786d6da807de2a7b8eaa91d34ab6c4a6e23d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 11576 bytes

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