Malicious PDF — malware analysis report

Static analysis result for SHA-256 09879794b9ae6cfc…

MALICIOUS

PDF

36.0 KB Created: 2020-07-11 23:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd91e2360bde7dd79d415d7f11f9c40c SHA-1: d61657c64e0c889ceaa392914a9cd1169af8d1c8 SHA-256: 09879794b9ae6cfcdc24215ca56dbc81893426bba0ebc6dc567a6127095a5811
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the ttraff.com redirector. The document body, though obfuscated, contains a URL that is also present in the link farm, suggesting a coordinated effort to drive traffic to potentially harmful sites. The presence of numerous PDF links further supports the SEO link farm heuristic.

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=lakshmi+pooja+vidhanam+in+telugu+on+diwali
    • http://files.naturalhealthmembers.com/uploads/1/3/2/3/132303060/3508099.pdf
    • http://files.classicsteachers.com/uploads/1/3/1/3/131380001/risiwinaxisogo_lulibof.pdf
    • http://files.mariachristinepericozzi.com/uploads/1/3/2/7/132741194/zosoxane_pijimutatim_fuvalubopimuwi_bikejew.pdf
    • http://files.egamposol.org/uploads/1/3/0/7/130775856/a1040f6be24b364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nonuwivab179611077.files.wordpress.com/2020/06/74271324517.pdf
    • https://mavuzomis.files.wordpress.com/2020/06/gajozemilonusoxatuxivebox.pdf
    • https://zojibulo.files.wordpress.com/2020/06/kasuvutopadukiruwasigati.pdf
    • https://pupuliledis.files.wordpress.com/2020/07/juniwobipavakuturededi.pdf
    • https://boxenixokina.files.wordpress.com/2020/06/79056113051.pdf
    • https://nuzobuko.files.wordpress.com/2020/06/11482653641.pdf
    • https://kemekakusava.files.wordpress.com/2020/06/27705234600.pdf
    • https://dasinejufefu.files.wordpress.com/2020/06/30345570776.pdf
    • https://tijezaj.files.wordpress.com/2020/06/dubawagaluwalurudegafufib.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/lutotoxosuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/jorolipezubenuza.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/60264080122.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/3365360625.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/tofimovanuzusobidujefigag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/sepejemupotopufegeranut.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/86287643547.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_off00004fcd.bin
b2fe7f7d35b0b32cf4413c65fc55c14eb48d67b5c9688494221485574565d258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCD 5392 bytes
font_01_sfnt_off00006215.bin
09a1e2ef2a405f24a88fc7f4b1d0b61deac9c5711b4eb37eedee7c412489a321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 9492 bytes

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