Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fc13fbaca478fb…

MALICIOUS

PDF

45.1 KB Created: 2020-10-29 07:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 719dd1bd40aae896b4249f4fc3a4aadc SHA-1: 23cccb4a55e4f9baecef5d160cc4613bfc7c3f1e SHA-256: e3fc13fbaca478fb090377088918b480f46987a6dfa153e3e9befa784713da4d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious or SEO-spam infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to ggtraff.ru, indicating a redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic.

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://ggtraff.ru/strik?keyword=probability+and+statistics+notes+for+mca+pdf In PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/rugegajoxivusetazom.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/7271212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_5f9387fcd10dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f9230b83123c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f8a7a46bf390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f9a3baa6271a.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wiporugagafa_vefozagozuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8f374ce1e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f872e4dce418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5f98c7f252ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5f93f79fc95ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f88645d6eafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8708c356ea5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8511/8638/files/vuvidavuvukofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e705e4f9-76f5-468d-bbed-2eba269e080f/delta_gamma_sorority_anchor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7274/8220/files/ej_green_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10ad460-8cad-40ba-8d66-91ceab6d900f/sabefavegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0510/3894/5445/files/double_space_period_google_docs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/nunelogojukunikigemorex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3144/files/49604025878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8804/3420/files/88514819788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9982636e-a9cc-436d-a97e-98f5429dace7/dogofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7929/7941/files/palan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6067/4979/files/79346056106.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 4

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_off00006e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7E 5544 bytes
SHA-256: a194b73cedc7821b24c57e8c3f94a2a66820cb27253728d0aa1d4cb58d5a9b65
font_01_sfnt_off00008147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8147 12128 bytes
SHA-256: afe7a36dada75e315d06199c11e9d85af2c25a73168783ac6f54be80aaa84242

Open this report in the interactive analyzer, or submit your own file for analysis.