Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60079b3e51c2e81…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 08:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2043d90dadfa1d3f1234abb70172801 SHA-1: bb664c72e037428b0645ca464be7663d2e37cab7 SHA-256: b60079b3e51c2e819825a3f98927d14388e9b5f668c27c9d68f1295b0c631811
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, which is characteristic of a link farm. One prominent link, 'https://ttraff.ru/pify?keyword=practical+skills+in+chemistry+2nd+edition+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to distribute malicious content or redirect users to phishing sites under the guise of providing access to documents.

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=practical+skills+in+chemistry+2nd+edition+pdf
    • http://vudozi.npcpasolutions.com/uploads/1/3/2/7/132740541/rekazijedi-roxoduvo-vezumeto.pdf
    • http://files.ennismustangmusic.org/uploads/1/3/0/7/130738969/labifozodal-nowazelafato-fedaleg-joloziguweb.pdf
    • http://files.advantagesupplyaustin.com/uploads/1/3/1/3/131379724/251269.pdf
    • http://files.faiths-boutique.com/uploads/1/3/1/4/131483440/sebowekoribap-kinex.pdf
    • http://files.nancyives.com/uploads/1/3/2/6/132681617/5837740.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/82396556160.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/79096032314.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/beneficiation_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0436/7879/3878/files/fodenupatovatibe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/livros_em_sobre_behaviorismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/zumojajumefopunuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0608/9640/files/regal_cinema_mccain.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/71848447109.pdf
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/notutinitopize.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/fuzofabiziriwig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/16215887094.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8315/files/56165382888.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_off0000693e.bin
edfc425f8603054dfa7d289f48435dc4ac812a587044d38569bf9e30ff7896cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693E 5480 bytes
font_01_sfnt_off00007bb4.bin
36123df35b59b3c2ff5a195be7ce2908a3cdca9e93ae12958b58a9f0af3939bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 10248 bytes
font_02_sfnt_off00009ea8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA8 4324 bytes

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