Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c09c9f2d66b39f…

MALICIOUS

PDF

36.3 KB Created: 2020-07-30 07:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2874a51b65881609a58ab513d37af048 SHA-1: 5809f127d9b96d0f8ede7da8f881039954b28c63 SHA-256: 79c09c9f2d66b39f04778b3002c66e4ebe9131e740d020b1ff55954b62a9f463
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=lol+para+colorear+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to direct users to potentially harmful websites, possibly for SEO manipulation or malware distribution.

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=lol+para+colorear+pdf
    • http://files.sovereignfoodie.com/uploads/1/3/0/9/130968968/jovetesezu.pdf
    • http://files.thekindnesstravelson.com/uploads/1/3/2/8/132814680/9487847.pdf
    • http://files.idesign-furniture.com/uploads/1/3/2/6/132696063/fafelizu_zilusuz_nobawel_bazifiberer.pdf
    • http://files.rebuildersspecialty.com/uploads/1/3/0/8/130874567/f3d26f7612.pdf
    • http://files.dzogchencollege.org/uploads/1/3/1/3/131379875/431652.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/14343242650.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/xirezutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0988/files/28005591.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/gojufoponexez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/61648875195.pdf
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/gidutuviwituzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/voruji.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/jebaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/zuguxifibigodikela.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdf
    • https://cdn.shopify.com/s/files/1/0439/6403/9326/files/49529153090.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/73410587770.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_off000055a9.bin
27cf4aa7007611d4e7d033c3637c3294d75a1fe60b715996af7f1dd159abba4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55A9 4468 bytes
font_01_sfnt_off000064de.bin
00303c6197c239bbe64700df21dd87f02d83a84f3c122ac07c63ccbddea48bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 9312 bytes

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