Malicious PDF — malware analysis report

Static analysis result for SHA-256 7556371155584bb4…

MALICIOUS

PDF

66.1 KB Created: 2020-08-11 16:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 731065e6064b4ff2e92c46511ba9dd1d SHA-1: 6e924ced896b5782502d2b2b4e249c96a8d75446 SHA-256: 7556371155584bb45a3ba7d09c3fcca8114614a5d78b2a44d61a1de4d0ec1f59
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to disguise malicious activity as legitimate content. The presence of many PDF links indicates a potential link farm or SEO manipulation tactic to distribute malicious 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=makalah+askep+retinoblastoma+pdf
    • http://fuselav.kalbproject.com/uploads/1/3/2/6/132681482/buwikevabuxipi.pdf
    • http://zufomiguz.gavaresse.fr/uploads/1/3/0/7/130739678/natif-mibifivitamujo-webuvelaxa.pdf
    • http://files.lttn.com/uploads/1/3/0/8/130873877/1674187.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/99075234409.pdf
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/20103640353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/dasozalixobazixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/kosanawugof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/22224327434.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/86529067820.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/3974814465.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/effective_advertising_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/anlage_av_2020_formular.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/chemistry_and_pharmacology_of_anticancer_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/6502400958.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/kuginesukaguselexu.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_off0000c651.bin
3b5803246c0f2ea36b67af872a56cfa1caa790f9da86e8418ea267fa2c734781		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC651 5488 bytes
font_01_sfnt_off0000d8c7.bin
63012189a3cecbfad749b5d975aa3667f55a7cbff903a274e618516034148bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 10208 bytes

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