Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa47c8bd7b02bbf…

MALICIOUS

PDF

39.8 KB Created: 2020-07-09 00:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: a76b796c00fa13bdec3e8b3f2994bf12 SHA-1: 8576fccdc1d8e2ca3085d4251f62bf925aa9305d SHA-256: 5fa47c8bd7b02bbf014e378d446997635d7cba19b4684e559c60881f5f5a69f8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files hosted on various domains, indicating a link farm or SEO spam campaign. One of the embedded URLs, https://ttraff.com/wb?keyword=save%20rotated%20pdf%20foxit%20reader, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text alongside some of the URLs, suggesting it's primarily a vehicle for distributing these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=save%20rotated%20pdf%20foxit%20reader In PDF document text
    • http://files.foxlakeresort.com/uploads/1/3/2/7/132740482/98be447.pdfIn PDF document text
    • http://files.netlander.com/uploads/1/3/0/8/130814785/64ebcfee.pdfIn PDF document text
    • http://files.feilonglight.com/uploads/1/3/2/6/132696117/goronijiwi.pdfIn PDF document text
    • http://files.mckenziebible.org/uploads/1/3/1/4/131452953/d651091ba2efc26.pdfIn PDF document text
    • http://files.floridaufonetwork.com/uploads/1/3/0/7/130775368/lezutawejo_lusipaxajegefi_kizija.pdfIn PDF document text
    • http://files.vermontsingingdrum.com/uploads/1/3/0/7/130775726/943e9227eb.pdfIn PDF document text
    • http://files.livinggodsmission.com/uploads/1/3/0/8/130874413/femobupowufebekoluta.pdfIn PDF document text
    • http://files.merakicowithlove.com/uploads/1/3/0/7/130740124/fa2220705c.pdfIn PDF document text
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdfIn PDF document text
    • http://files.potterysocial.com/uploads/1/3/0/7/130739315/mopufa_padodafu_limebozakapire.pdfIn PDF document text
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xiwidex.files.wordpress.com/2020/07/gufider.pdfIn PDF document text
    • https://fitapozuwox.files.wordpress.com/2020/07/razukosusubebibonazamuza.pdfIn PDF document text
    • https://pefugobojum.files.wordpress.com/2020/07/lavekopipajemix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 4740 bytes
SHA-256: 9650305408012aeec65b3e6a4081e7734c1dd8b06d59b37f6f05b69de70ae824
font_01_sfnt_off00007011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 10000 bytes
SHA-256: 16b9370df641bc98a1509eb2d3e5aca35396de889e055300f3a874f1ba089e8d

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