Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d3ff9a97d04400…

MALICIOUS

PDF

55.9 KB Created: 2020-08-12 04:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2af0e773735fbbd21ac0044f0989d92f SHA-1: 34becca075a9956f7471a2b37183b66bf6801220 SHA-256: 60d3ff9a97d04400efa1228579eb051a4b059721999744c5dd53c28d1311958d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to generate SEO traffic, with a primary link redirecting to malicious infrastructure. The document body, though partially corrupted, includes text referencing 'Datacamp courses pdf' and the malicious URL, suggesting a phishing or scam lure. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful content.

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/pify?keyword=datacamp+courses+pdf
    • http://files.octavesprogram.org/uploads/1/3/1/3/131398291/redan.pdf
    • http://files.comcomnetworksw.com/uploads/1/3/1/1/131163867/5685308b2c.pdf
    • http://files.iyhfoundation.org/uploads/1/3/0/9/130969489/zasosuwupoger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/zuvuduvagarexixanopotona.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/50080795394.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/zaxopopigaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/14624782299.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/jawaxolitelujezeritojolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1280/8091/files/cablage_automate_programmable_industriel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/adulteration_and_evaluation_of_crude_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5522/files/oxford_read_and_discover_all_about_space.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/blacksad_amarillo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/61795006557.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/87530563802.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1414/files/xujikanovaxubuxefogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/51400530823.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/blagues_carambar.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/donnelly_atlantis_the_antediluvian_world.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000069f8.bin
2a3eefc3fbf32de2458e7e6547177b19ce7b8d6ffcd99a4ba3a38a53d9e0372e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x69F8 16424 bytes
font_01_sfnt_off00009da1.bin
d69174b8511300c33310b5b376b9cbc47d064ce9ca2b9bcdc54e19cd05c33178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA1 5268 bytes
font_02_sfnt_off0000af73.bin
52845ecdf0c1b322decee295922d8919aa414e890d4ab5c50711a174d9e1ceec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF73 10120 bytes

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