Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae23219763cba44…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 21:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32b443b4ffe988aa5b7bf6524d35588a SHA-1: d5156fbb41f49feffe354d44e02dcfa89dd36d72 SHA-256: 0ae23219763cba44b02faa257d6a5e2c9dba1daf272ea77419f9014425df31b5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=access+iff+statement', is flagged as a malicious redirector. While no scripts were explicitly extracted, the structure and embedded links suggest an attempt to redirect users to malicious or SEO-manipulated content, potentially as a precursor to further compromise.

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.ru/pify?keyword=access+iff+statement
    • http://files.markcraiggallery.com/uploads/1/3/2/6/132682806/7829d.pdf
    • http://files.baileykidsmusicals.com/uploads/1/3/1/8/131871416/109e7820ed.pdf
    • http://files.lendalejohnson.com/uploads/1/3/1/8/131871621/tadasirejuvodatajuma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/wozegarila.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/setofazi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/manegulazepezanil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/xolokuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/29482402152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/40364011726.pdf
    • https://cdn.shopify.com/s/files/1/0440/2633/1286/files/fovego.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/30172787342.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/muvubojakol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/doleguwajuvezuvexas.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_off00006c46.bin
24d7a488a0b4ff05440642fbff12618270ec036b21da7829c8c236366c70e8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C46 4568 bytes
font_01_sfnt_off00007ba0.bin
7c4a61fa4728f44c00dad9f66812b686c4fb4c95c7351f08fda8969eb6d4982c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA0 10592 bytes
font_02_sfnt_off00009fbd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBD 4324 bytes

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