Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fd33b9e236a560…

MALICIOUS

PDF

44.9 KB Created: 2020-07-28 15:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac170702a2eac628a85820de7c8becc5 SHA-1: 24221eca38a00162a3982e7f43f352d7af02085d SHA-256: 68fd33b9e236a560f619dab3e3e561d5c7a95082fe1927116fc62ca153aee734
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. While no scripts were extracted, the presence of malicious redirector links strongly suggests an intent to lure users to harmful sites, likely as part of a phishing or malware distribution campaign.

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=chicago+manual+of+style+citation+footnotes+example
    • http://files.eastworship.org/uploads/1/3/1/3/131381772/wikonipawejon.pdf
    • http://files.janbyrneceramics.com/uploads/1/3/0/7/130775633/wefudizadigov.pdf
    • http://files.simplymello.com/uploads/1/3/1/6/131637679/vopeja-jobadena-wixasib-zulugizeranaj.pdf
    • http://files.widhalmcustomhomes.com/uploads/1/3/1/3/131383934/8f19ef67.pdf
    • http://files.topographyandink.com/uploads/1/3/2/6/132695569/wiwepijuxa-goxuperul-bowub-bisazikekeseba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/17808708878.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/vizuzebujipalifekako.pdf
    • https://cdn.shopify.com/s/files/1/0434/7228/9944/files/41140232781.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/28869319236.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/74384122532.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/5753542628.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/68888571910.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/nugadovaduler.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/paronodanima.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/vabipifuvatiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/90518949840.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/59566564588.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_off00007246.bin
b48837bfea2483bf3276d40505e4f59fd4c3e26778bfc81f9907e516f975219f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7246 5408 bytes
font_01_sfnt_off0000849d.bin
84f1a76b4f0554808b73a3b0ccb83aa52b7fb89d57ce117aa10b990edb7edee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849D 9796 bytes

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