Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f78187cf388d3a…

MALICIOUS

PDF

44.0 KB Created: 2020-07-08 23:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 5da7472ad04fe71b656cc1cb3777a724 SHA-1: ed333e45c9d6e0b2c2bd33e5a4b69b7e10c7be11 SHA-256: 10f78187cf388d3a03f3b88d7c8cc8861314dda766ce11f868a5d2766a1d6e17
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.com/wb?keyword=genetica%20pdf%20resumen, is identified as a malicious redirector. The extensive link farm suggests an attempt to manipulate search engine results or distribute malicious content through indirect means. The ML classifier also strongly indicated maliciousness.

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=genetica%20pdf%20resumen In PDF document text
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdfIn PDF document text
    • http://files.missjordansimpson.com/uploads/1/3/0/8/130874580/3e6a53642dcc.pdfIn PDF document text
    • http://files.maibonsai.com/uploads/1/3/0/8/130873907/4f9e86195392.pdfIn PDF document text
    • http://files.peschketruckinginc.com/uploads/1/3/0/9/130969572/8465fb.pdfIn PDF document text
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.pdfIn PDF document text
    • http://files.foxrungroup.com/uploads/1/3/0/7/130776481/ziguluwumimave-lewurab-bokajer.pdfIn PDF document text
    • http://files.framemysore.org/uploads/1/3/1/3/131384789/7349004.pdfIn PDF document text
    • http://files.asianlifestyletv.com/uploads/1/3/1/4/131453007/4121461.pdfIn PDF document text
    • http://files.mymat-studio.com/uploads/1/3/0/7/130775509/fekuki_pibin_tuvem.pdfIn PDF document text
    • http://files.sweetbabiesdayhome.com/uploads/1/3/2/7/132740320/zipud_wenuv_soraminudej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zuwosubejobo.files.wordpress.com/2020/07/gamemiras.pdfIn PDF document text
    • https://lazatojifu.files.wordpress.com/2020/06/vupopizuxoxiwok.pdfIn PDF document text
    • https://robipini.files.wordpress.com/2020/06/25394811672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.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_off00006c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C21 5072 bytes
SHA-256: ade1d5398b31449a405312bc9cc44673969ef37cf756bd1f2c5b7a540eb7d8b0
font_01_sfnt_off00007d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 11124 bytes
SHA-256: 3362e792947244684e7124e326daa1727f79d183a9b7e8b1a9fdc2a8a9b36fd0

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