Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eead354072b15a3…

MALICIOUS

PDF

61.1 KB Created: 2020-09-20 01:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 843fa92c10186781ffe4f983a1cef24e SHA-1: cffc579f90e8bee99484d4f690e16bde34d7bfae SHA-256: 0eead354072b15a34f26e6f4e66e97a1b925cce5abe8519c1eb93af0b3d2c6fc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to direct users to malicious sites, potentially for phishing or to serve further malware, aligning with spearphishing attachment tactics.

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.me/wix?keyword=inferi+harry+potter+scene
    • http://lirimedef.iflightbook.com/uploads/1/3/1/4/131437294/6365793.pdf
    • http://tawijo.marissaoneil.com/uploads/1/3/1/1/131164273/9074205.pdf
    • http://somisig.4dtraining.co.uk/uploads/1/3/2/6/132695887/wodudulusikafaf-sepigubiba-teliwa.pdf
    • http://files.ihm-parish.com/uploads/1/3/0/7/130775245/papikasino-voleremofogeg-gadawogedife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a32ccff8-8bb5-40b2-bfad-024529b6c6b8.filesusr.com/ugd/b5472a_00e2123b4d8b427283fe0c439845f4d7.pdf?index=true
    • https://6c9dba64-6875-432b-bef4-17db3d0e1b6a.filesusr.com/ugd/7836c9_7db6dddf06ec4fe4a590176dab1e3c42.pdf?index=true
    • https://3bff1510-2c1b-4606-b4ec-0a8664b5538d.filesusr.com/ugd/a4e402_62939cc1e79543ec990d4ef85fa105ba.pdf?index=true
    • https://4bbdb92f-21ec-4d0a-91dd-0ef2e1bd9fcd.filesusr.com/ugd/460efe_fe64baeb98654719b7e68c5cbe0a4a01.pdf?index=true
    • https://e0451816-7afa-4b0b-abdb-5c633e0ef91b.filesusr.com/ugd/c63dba_bde99868de034b9fbe64bbc36ef48a95.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/tumisapagigig.pdf
    • https://cdn.shopify.com/s/files/1/0457/7450/4102/files/gumavejitorapalijid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/41779179458.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/merosib.pdf
    • https://78636ec4-6926-449a-8e36-16490a60a502.filesusr.com/ugd/913720_7e64927dd7604c6e8d794ad2933d869d.pdf?index=true
    • https://e9c8ae7a-3085-466a-92cd-e6572923ff43.filesusr.com/ugd/913720_d80a42ca5f7a41dcbf9c48137d33ccc7.pdf?index=true
    • https://3ff1fc15-6bae-428e-9dc1-863a1c62bebf.filesusr.com/ugd/2a1429_b0bfaf2804a842d8ab169c9acd6b5412.pdf?index=true
    • https://248f49dd-8b5c-410d-b75c-35ecdf3eab7b.filesusr.com/ugd/38eac1_57152f4e53184a07809fde0b93ca2b81.pdf?index=true
    • https://03916d10-1e80-4ef7-ab59-d0693fe75f39.filesusr.com/ugd/c1de29_33f8664d9a374e87bff5311ca7399d88.pdf?index=true
    • 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_off0000b34c.bin
29ef1d857edf4480091736e4e3c3b1cb5f0924f9d413acf93dcf1bc27cc79a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB34C 5112 bytes
font_01_sfnt_off0000c4b7.bin
51b0f128f17e3a7e97902032dd01ef29673beeb5672c77ea43e9f470939c7c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B7 10024 bytes

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