Malicious PDF — malware analysis report

Static analysis result for SHA-256 da826d2f3a9e3ce6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 23:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2d8b1dd8844cc4e8db4aaa8913c4918 SHA-1: f3f2e1491aaeb5e1f3d7f81412733b291d1dd306 SHA-256: da826d2f3a9e3ce66ccb81a296b21f3de2b58e19e1e7dbfe8661ef648a4cdda7
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=alimentacion+y+nutricion+infantil+pdf', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download further content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=alimentacion+y+nutricion+infantil+pdf
    • http://zazudep.cbpso.com/uploads/1/3/1/4/131483337/8165438.pdf
    • http://dajewuti.karlfamilybaskets.com/uploads/1/3/0/7/130738732/9045251.pdf
    • http://tuzubini.seraphimschool.com/uploads/1/3/1/1/131163599/44639f4b0390a.pdf
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/2004_volkswagen_touareg_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/peduloniru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/tubomasovesowolojujun.pdf
    • https://cdn.shopify.com/s/files/1/0428/2974/2246/files/paxuwemunugatitaradozulam.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/14183673083.pdf
    • https://cdn.shopify.com/s/files/1/0437/6133/6471/files/lufudeduzapazolajusomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/lasemaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/solitusenulekexilulob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/monday_punday_148_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/tarenokorepijejutewak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/96773360916.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/nifumorojepibaditiriwe.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_off000069cc.bin
ed4b7b46255b32b51ca872ac21ab4baae5d3a6a4cc3908fd5a3a243a6a62fae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5212 bytes
font_01_sfnt_off00007b71.bin
972f7c911d2169ab2b94c6b4ea300d513a02b048bc08c75cd4e8e184eaaa52e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 11124 bytes

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