Malicious PDF — malware analysis report

Static analysis result for SHA-256 49128814e027b2ad…

MALICIOUS

PDF

49.9 KB Created: 2020-08-18 15:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deaf0110c1ae4db3b47a83db1abcf0a8 SHA-1: a91d12c1a16717ece2b2419af48f03b07e3394e2 SHA-256: 49128814e027b2ad4de9a0e943f95d1ea731134d597b81355e9631b683cd7471
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'platform weighing scale for sale philippines' and the malicious URL, suggesting a lure for potential buyers. The PDF also hosts a large number of other PDF links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious infrastructure.

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=platform+weighing+scale+for+sale+philippines
    • http://nawojedin.confeybiol.com/uploads/1/3/1/4/131482975/641033.pdf
    • http://files.afiniadentalportal.com/uploads/1/3/1/3/131379759/gomolevavo-tefiwaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/55176928963.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/mapamundi_fisico_con_nombres.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19463184481.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/mojofojubajeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4610/0377/files/xodokovopenuvovulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/bongo_cat_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/zipenipuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/kogokezulawovotafurak.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/68907369623.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/20929498610.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/vugowoseniduj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/jurobebejagiliven.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8969/files/mevesunugoxaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/87955984875.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_off0000832c.bin
33653ee59240f70311c3206bb7279e43e6ee0e9cdcdef9072da10df36ccbcd42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 5520 bytes
font_01_sfnt_off000095e0.bin
f90a2c94780963d32af707377bcbd3b1d0f85985244afa86a912c0e69b99b8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E0 10832 bytes

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