Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3a39bf832201e7…

MALICIOUS

PDF

46.1 KB Created: 2020-07-08 19:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3232486b73f6f900d4cfabfffdc1c0d3 SHA-1: cac6d0d0b677800c2660ba97cdc34008ecc064e4 SHA-256: 1e3a39bf832201e7d92e9870c670cd001deaa821142a56c77731689a4854fddd
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary URL, https://ttraff.ru/wb?keyword=sulfonamidas%20trimetoprim%20y%20quinolonas%20pdf, is identified as a malicious redirector. This suggests the document's purpose is to direct users to malicious websites, potentially for phishing or malware distribution, leveraging SEO techniques to appear legitimate.

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.ru/wb?keyword=sulfonamidas%20trimetoprim%20y%20quinolonas%20pdf In PDF document text
    • http://files.nailsbyanitakillarney.com/uploads/1/3/0/8/130814342/xebenom-penesoxe.pdfIn PDF document text
    • http://files.thinkanomalous.com/uploads/1/3/2/7/132710787/nejugo_fetaxen_vijixer_nujogutoninuj.pdfIn PDF document text
    • http://files.laucandrique-en.com/uploads/1/3/1/6/131606619/9202608.pdfIn PDF document text
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdfIn PDF document text
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdfIn PDF document text
    • http://files.teach4more.com/uploads/1/3/1/6/131637919/1720115.pdfIn PDF document text
    • http://files.dustyroadhorses.com/uploads/1/3/1/4/131453725/kafovovolapufusix.pdfIn PDF document text
    • http://files.mbilder.com/uploads/1/3/1/4/131406816/1092288.pdfIn PDF document text
    • http://files.bespokeoff-road.com/uploads/1/3/0/8/130814785/jugojaze_lojiji_femis_tolem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kemalorudor.files.wordpress.com/2020/06/wevokokejuwuvezi.pdfIn PDF document text
    • https://vesizup.files.wordpress.com/2020/07/1275632124.pdfIn PDF document text
    • https://jafujanile.files.wordpress.com/2020/06/natefupoxumarivib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.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_off0000730d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730D 5400 bytes
SHA-256: c257645d891ab5051d7ef1fbb79dbb014cd0ada1d3e6ac5bc375eb0343d5c046
font_01_sfnt_off0000854b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854B 11248 bytes
SHA-256: ee39b7947dcee33606f1a86cc635c3421f5f786f2cd66f0bb31979920e6a713c

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