Malicious PDF — malware analysis report

Static analysis result for SHA-256 366c70adae721bae…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 05:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9399b2a11746f53be9791f0317c448e SHA-1: a85104b08172a780ea80151f1980e7c7cd215b5d SHA-256: 366c70adae721baeee0e37444dfddea41cf86b83d081137d2e031d96e763a298
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to a redirector service identified as malicious. The document body and embedded links suggest a lure for a fake file download, specifically a chemistry manual. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=ap%20intermediate%20chemistry%20practical%20manual%20pdf%20free%20download
    • http://files.geninemarielarin.com/uploads/1/3/2/7/132710679/wujisutojig.pdf
    • http://files.southerngothiccollective.com/uploads/1/3/1/6/131607027/748cab5d333d.pdf
    • http://files.johnvcatania.com/uploads/1/3/1/4/131483830/892fcec2fe27.pdf
    • http://files.grasshopper5k.com/uploads/1/3/2/6/132695325/sabafev_tosefefovan_pelitudifilo.pdf
    • http://files.bassriver-nj.org/uploads/1/3/2/6/132682585/didezedoxowu-pinulizawerinox-sabok-xepulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/patutubepozopusila.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/tetakipujivukosafanepub.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/favowodososolizexesorot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/mages.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/47783372297.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/vezimud.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/56225921068.pdf
    • https://cdn.shopify.com/s/files/1/0450/6550/2872/files/bending_stress_nptel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ff.bin
deca48cc1a29222cf93e9c028010528a6487e81e4cd18d385aaf9444b716c3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FF 5580 bytes
font_01_sfnt_off00006bdf.bin
2c3e0b397f856a67cabffb04ff39643ca9dcc2e9b8f6e32e57761a24a12ee361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 4852 bytes
font_02_sfnt_off00007cfa.bin
754622888ee10a8fabf52ab219b5e6399eb5098fa6f81d228cadacec8cd3bbcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFA 10212 bytes

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