Malicious PDF — malware analysis report

Static analysis result for SHA-256 032f1fe4c1b30520…

MALICIOUS

PDF

76.0 KB Created: 2020-08-04 13:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb700e3997d1dce741dec1c540c6e10f SHA-1: cbb9ddf6fd86b149d8976ca1f6b7a6fb7476b981 SHA-256: 032f1fe4c1b3052000a57deb426a042cfb66f522f59f62c6ee9ee52882f8d7fa
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to external PDF files, a technique often used for SEO poisoning or to host phishing content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=catalytic+reforming+donald+m+little+pdf'. The ML classifier also strongly indicated maliciousness.

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=catalytic+reforming+donald+m+little+pdf
    • http://files.alisonweatherly.com/uploads/1/3/1/1/131164393/xegekazon.pdf
    • http://files.zeta-xi.org/uploads/1/3/0/9/130969580/7988781.pdf
    • http://files.canelitaart.com/uploads/1/3/1/3/131383943/poluzokusagenukokam.pdf
    • http://files.vmvikings.com/uploads/1/3/0/8/130874055/fagiluxidejam.pdf
    • http://files.dawn2duskhomeinspection.com/uploads/1/3/0/8/130874671/nobatoto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/turotede.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/68157867339.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/tefasug.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3699/files/gixaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0512/files/11455156379.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/53470896845.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/kupotisixeburifomurukiwas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/defafew.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/31615486854.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/jquery_remove_all_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/fatidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/99247017839.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32d.bin
6c817595b6a47db9b455d541a02a8c653e069854deb019348c2a0938a39bec6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 5212 bytes
font_01_sfnt_off0000e4d8.bin
5c4a0cc0caa8b5a78d859cb9f8e51895b9f40f38316e35c18e6a752af4a78d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D8 15392 bytes
font_02_sfnt_off000114c0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C0 4324 bytes

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