Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb2bd1a9ca87957…

MALICIOUS

PDF

39.7 KB Created: 2020-09-17 03:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90fb52139e5851a73aebf197fba48045 SHA-1: 79d95d27557334222a7c7139bc3de42ced8e5f5d SHA-256: 6fb2bd1a9ca879573b4bb70d6abfc14b86e61fa93a682ab9ade5b1b380770875
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a malicious URL, masquerading as a free repair manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the primary URL as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

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.club/wix?keyword=honda+generator+repair+manual+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/xilifopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/dua_for_waking_up_early.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/zutivemun.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/juvexijogezujasaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/kaputewuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/tangible_and_intangible_assets_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/ketogenic_diet_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/62307445800.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/word_document_to_converter_free_download_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/pegugifikubegilosi.pdf
    • https://4b11af44-3d97-4cee-8ac0-8465c325751e.filesusr.com/ugd/a64c8c_daabcc7bd8b4463ea45a008c4a63471a.pdf?index=true
    • https://3253cd14-ab7b-4e4b-87a4-b68a0d67e2e6.filesusr.com/ugd/d902bb_137a44ef7e6b44b6834004f2cdd02783.pdf?index=true
    • https://314d5fdb-7755-44a1-b1c5-42a95527616a.filesusr.com/ugd/9ff9b8_21b6974d114e4cd38b73d544b1a4d33b.pdf?index=true
    • https://97a91cfe-ab80-4475-86f0-9aef28c0f054.filesusr.com/ugd/7c30af_db42f8f813f444e39b2e63fc556f81e8.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_off00005e0e.bin
8af8865a5a65faed906749cb22f655b6f316932e383d1231b65c580e50e7f89b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0E 5144 bytes
font_01_sfnt_off00006f7b.bin
572074721585b4cf5157566c7c9c22bceb6da0595e0e4ca047b110a58b677cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7B 10096 bytes

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