Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f80bd69d2ea9e1…

MALICIOUS

PDF

45.4 KB Created: 2020-09-04 08:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e14e7da98fe26dc0e0f592d85e9825a9 SHA-1: 32674ffd32e35614f8941c672108af2ada659e1d SHA-256: d4f80bd69d2ea9e129df6cf8421c21f44ec8c24d9f22a6a58b2d7f1d3b7982d3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.me/wix?keyword=dodie+6%252F+10+piano+sheet+music'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious infrastructure. The document body, though partially garbled, contains text related to 'piano sheet music', likely a lure to disguise the malicious intent.

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=dodie+6%252F+10+piano+sheet+music
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/93961654610.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/10909244403.pdf
    • https://cdn.shopify.com/s/files/1/0457/9134/6844/files/65720406961.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/bosch_cctv_system.pdf
    • https://cdn.shopify.com/s/files/1/0464/6800/6040/files/cebuano_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/71143245426.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/11842281006.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/download_free_manga_comics_books_cbr_online.pdf
    • https://static.usrfiles.com/ugd/d4c4cf_c0aa4d2ed2e6491a99d9c7620d0548ef.pdf
    • https://static.usrfiles.com/ugd/9cc572_908c02cd94944be9b231ba6e6c58b38f.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/cfw2ofw_helper._exe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3421/3543/files/riesgo_psicosocial_resolucion_2646.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5263/files/public_finance_regulations_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/18011129195.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005133.bin
65881385935977b0ba226322226ee17cce4e5f52cb6b2ee277da82b25d7151ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5133 5568 bytes
font_01_sfnt_off0000640c.bin
629704b3a8b69860d9a6d107dc4b1d2bb78be0207d30873aad4cc32a60128795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 14940 bytes
font_02_sfnt_off00009336.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9336 16204 bytes

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