Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffb33d119e27069…

MALICIOUS

PDF

33.2 KB Created: 2020-08-06 07:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f13bb2e10b4f7bfb2bb5ce9332a91c SHA-1: 904c58b79267b5fb3840c61812debaad70e710c3 SHA-256: 2ffb33d119e2706978cab37a86e0943636ea23635d2b4f2f9a013641671c76ca
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO abuse tactic. The primary malicious URL is ttraff.com, which is known for redirecting to malicious content. While no scripts were extracted, the sheer volume of links and the malicious redirector strongly suggest a malicious intent, likely to drive traffic to malicious sites or to manipulate search engine results.

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=linea+del+tiempo+de+la+historia+de+la+administracion+pdf
    • http://piginixik.nccueagletravel.com/uploads/1/3/2/7/132712207/gipugok-perezinoxosu-xujurazozegoki-davamefafozap.pdf
    • http://files.terpstrasinafrica.org/uploads/1/3/2/6/132680827/e2c30b1.pdf
    • http://files.trinitylutheranconnellsville.org/uploads/1/3/1/4/131410736/zofuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0435/9618/5763/files/essential_human_virology.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/52391833265.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/27086492273.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/11528387110.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2967/files/babitimujapopaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/4890504518.pdf
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/xupopulalenoborobuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/biodegradable_polymers_for_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/raveb.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/85406056851.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/xatojawilesol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.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_off000045bd.bin
bdf04aba65996ebd6570dc3cbac5f5eb95c4156d65b988cbb4bb591a64fe4624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45BD 5336 bytes
font_01_sfnt_off000057ba.bin
0f2646597b52bf096ac89c280adba7d443fbdf30b7f68b0914d442b3d690b25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57BA 9148 bytes

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