Malicious PDF — malware analysis report

Static analysis result for SHA-256 e587753dc2a5294f…

MALICIOUS

PDF

62.6 KB Created: 2020-08-01 04:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f88adb94cab56f32e21288ab1dcdeab SHA-1: 608a0c6b8420bf219b6c41285592a9462c943684 SHA-256: e587753dc2a5294ffa5eb879d0e2465f86eda67d504920c1ade1a3774b61809a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

The PDF file was identified as malicious by an ML classifier and contains numerous embedded links. One critical link redirects to `ttraff.com`, a known malicious redirector. Additionally, the PDF hosts a link farm on Shopify, with many links pointing to other PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/wb?keyword=manual%20de%20supervivencia%20de%20ned%20coco
    • http://files.cornerstonesaints.com/uploads/1/3/0/7/130740033/9143567.pdf
    • http://files.kerrybrookfarm.com/uploads/1/3/0/7/130775232/69a9454eba03efb.pdf
    • http://files.reliantfurniture.com/uploads/1/3/1/0/131069978/1149053.pdf
    • http://files.nawink.com/uploads/1/3/1/6/131606331/7b57b0acb.pdf
    • http://files.maccurdysalisbury.org/uploads/1/3/0/7/130738859/c0960.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/badusezatijuvagawinugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9646434013.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/38425232644.pdf
    • https://cdn.shopify.com/s/files/1/0438/1956/5216/files/rukuwitumamomizemuza.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/wunatidekofutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/76303531584.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/bamarogusoxodatogejok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/51956479275.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/kawumaxora.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/gexasirag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/95838499883.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.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_off0000b65d.bin
5130efe6c05caf4110d51b83970871962e69d1ec35df648016039cf37fd641f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB65D 5132 bytes
font_01_sfnt_off0000c7f8.bin
0edc0d8758bf10f26e84ac5714352d83163aea00b183ab5f25def6467774de79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 10844 bytes

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