Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cecc1c801d0a0b2…

MALICIOUS

PDF

38.1 KB Created: 2020-10-16 01:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ad0bf71fa6565c66fb98db15bfb9d773 SHA-1: 66ccd2ef609607ecb0a99acb29cfb5a485352b47 SHA-256: 5cecc1c801d0a0b236f0824200035d9dce643a7d491ffdf93c11a82362ed5f95
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though partially obfuscated, contains text related to joining images to a PDF and includes the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links further supports a link farm or redirection strategy.

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://cctraff.ru/123?keyword=join+images+to+pdf In PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27db3cf-5f14-4dc2-b458-52a2da77413e/xuzakevozivofopefotibafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66201156-a808-487e-9d0b-383ec7b971bd/34049088260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ad4ce4-6ee3-448b-aa4a-10d5cd933b75/tokar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a6decb-39a1-4807-b520-928df8eea4ed/6908098971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4357f3e-3034-4d1c-91f4-dc9a8fbbd250/retavitogununew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2575/9893/files/63967137949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8797/7366/files/32312801494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3170/9854/files/sisebivetatorizom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4784/8602/files/gixafujomilid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/crane_ee-5301_red_light.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6914/4739/files/83670113950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9431/1580/files/79973166652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/gelubofijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6534/3637/files/ben_10_goop_first_appearance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1de46ae-35b2-41a8-9f19-65bffcbccd3d/dirakazuripibef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0943c5-0595-44a7-bdc8-6314ecdf886c/fopodotafelatuveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebb7374-c37e-432e-b2c1-761071ebda2d/kamunozagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d61a83e-20ea-4951-80aa-10e534c944c1/namelulitopazupinov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000558b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x558B 5220 bytes
SHA-256: cd7268ebeb4f9fe72fd0e3dc545967afd384b2b236b8bbabda25e45811c64e4d
font_01_sfnt_off0000673d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 10788 bytes
SHA-256: 9ec936fac08136e596c39e4d0341f1448b5d93ae6df49d6405100359ccb3462f

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