Malicious PDF — malware analysis report

Static analysis result for SHA-256 6296d2e790f326ce…

MALICIOUS

PDF

56.0 KB Created: 2020-08-06 02:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc0e6b3366c17d3e3b7615e83823879 SHA-1: 87cb64e8edd9d45e31f933a65d572c45f438fccc SHA-256: 6296d2e790f326ce48d94a2fd59fa865a7e0f74822bb09aec7a552f1dfd7233a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO spam campaign. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=celebration+hymnal+for+everyone+pdf+download
    • http://zetoxe.annalisavivona.com/uploads/1/3/1/4/131437792/6aba9f75b7cd3.pdf
    • http://files.tradebohon.com/uploads/1/3/2/6/132681579/7209022.pdf
    • http://files.searosestudios.com/uploads/1/3/0/8/130813526/e9cccf6.pdf
    • http://files.bitingintothecore.com/uploads/1/3/2/7/132711966/tutusaniz-xogalogerarop.pdf
    • http://files.thespareroombook.com/uploads/1/3/1/4/131455283/8592225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/76272381587.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/45699702398.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/64430675349.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/40873140834.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/zusabepajupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/vemurebosizafuguw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/domejadokokenafovilafesov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/zumdahl_ap_chemistry_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/60832749764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/mimatobesubatamota.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_off00008f6d.bin
371391ec59be58adf295dfaae498e2bb40aa344a8cff086dc745a99b40c95dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6D 5400 bytes
font_01_sfnt_off0000a1b1.bin
bd4005f713d7fd62f8fd82be1acedf36defa4de40ea40b35ad7f3bdbca4ec0b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B1 16200 bytes

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