Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ed30d22969cc97…

MALICIOUS

PDF

41.6 KB Created: 2020-08-13 15:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c89770b5ddb5bd26877426086be83e66 SHA-1: e7ad78435c1bc8f1b36805ed961b48d0c237d30d SHA-256: 08ed30d22969cc97df0cae865de70d7c8d5c7bc05911b3965d534ece31c53844
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated and contains a URL that points to a redirector, suggesting an attempt to lure users to malicious sites. The presence of numerous external PDF links also indicates a potential SEO manipulation or content hosting scheme.

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.cc/pify?keyword=adoramus+te+domine+taize+pdf
    • http://kagug.fromplaygroundstopurpose.com/uploads/1/3/2/6/132681670/c8c5acb.pdf
    • http://files.thoreauwayensemble.org/uploads/1/3/2/6/132681308/1790876.pdf
    • http://files.paws4acauseinvitational.com/uploads/1/3/2/6/132681757/9deeb9ff23fd2c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/25009559038.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0202/files/hodgdon_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/xejururojemenevuvesu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3517/files/60897974415.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/gojufoponexez.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/95654975704.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/mivaraf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/introduction_to_operations_research_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/83744417055.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/chainless_bicycle.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006020.bin
72688ed65f701433089de668b682dfe8347815484926060baedb97f3ac994404
pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5196 bytes
font_01_sfnt_off000071ba.bin
8abb840194bb1d47fdef76576bef110e0402a5df56bdc3f803e2b10be59b11d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 11960 bytes