Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a049d50d10a4c18…

MALICIOUS

PDF

32.3 KB Created: 2020-08-30 03:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d0221de5837e25de8634baa87d6ae80 SHA-1: ded83078af95121f63c940b618727ea4d4e9feb0 SHA-256: 6a049d50d10a4c18c934a891bb4128d00eb80b055ae0c0dfaa187c240886f10d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to direct users to potentially harmful 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/wix?keyword=tabla+de+diferenciales
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/31366152178.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/19148866985.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/40796382229.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/children_s_place_uniform_shirt.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/kiwaribopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/sitotakotifomedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/jeleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/56783852319.pdf
    • https://static.usrfiles.com/ugd/4f270c_9c3ce4e31d2e4015b0e76e2239cea4da.pdf
    • https://static.usrfiles.com/ugd/b5472a_4b570142714c441a88661a7390c674c7.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_off000041bd.bin
7156f29e96f695321d9b0ee028e7661bdcf92d432d31b0ec3d8a5e25d338df4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41BD 5104 bytes
font_01_sfnt_off00005321.bin
7b6e9e26dae6186611739a2f85654286c578b5aa322177d4fe584aad7c3f1c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5321 10368 bytes

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