Malicious PDF — malware analysis report

Static analysis result for SHA-256 962cf6c26b6422f4…

MALICIOUS

PDF

54.9 KB Created: 2020-07-30 17:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 217ea65a4608790df7c79428a4c4861e SHA-1: 828d7e076ad02425ddc57f50ca6141a3431f9034 SHA-256: 962cf6c26b6422f4da8a18e6af4cdd6ca35f89761eefefd843093aa6ff3b5280
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 of which point to a redirector service (ttraff.com). This indicates a link farm designed to obscure the final destination and potentially distribute malicious content or phish for credentials. The ML classifier strongly supports the malicious nature of this PDF.

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=marketing+concepts+and+strategies+pdf
    • http://files.3counties.info/uploads/1/3/1/8/131857723/kusideratibiti.pdf
    • http://files.wfut.org/uploads/1/3/1/4/131406861/xivodomopo.pdf
    • http://files.dottiesflourshop.com/uploads/1/3/1/4/131453267/67bf3ac45d32a66.pdf
    • http://files.onyxfgallery.com/uploads/1/3/2/7/132740424/rejagasefonejel.pdf
    • http://files.3counties.info/uploads/1/3/1/8/131857723/kus
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/82831699450.pdf
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/97826419293.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/12311678683.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/xalevonogapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/72284567170.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/9913586010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/85695128541.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/kudoluvalakidido.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/86395243360.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/17546348445.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099d4.bin
1760d41042d243be8ae5288d12a18f3c98cd0a534ff999dc397bf1b9a37ff13c
pdf-font-stream PDF embedded font (sfnt) at offset 0x99D4 5148 bytes
font_01_sfnt_off0000ab69.bin
32f38731ca2bbdb2d36f8ef38b089deba30dd3fad6bcf36ca0b2ebab4f31185d
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB69 10236 bytes