Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec19f725cb39f62b…

MALICIOUS

PDF

52.4 KB Created: 2020-11-02 00:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0a31aef3f6d1e1a44e4ac69dc9678382 SHA-1: 9727db1aa2d34671bd37df3a9a2037e30afb2901 SHA-256: ec19f725cb39f62b0917ce4d7159ed39ab761cfb00fc062fcd5f4b53ed1ba057
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a fake CAPTCHA and advance-fee scam lure, designed to trick the user into clicking a link. The link `https://ttraff.me/123?keyword=the+wife+s+story+events` is identified as a malicious redirector, likely leading to further malicious content or exploitation. The document also hosts a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.me/123?keyword=the+wife+s+story+events In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f938c71f037d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8d858e72564.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/d3e2c515c.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/2105481.pdfIn PDF document text
    • https://lakizixobatit.weebly.com/uploads/1/3/4/3/134325667/ruxepotopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f90f740000f6.pdfIn PDF document text
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/bisolewuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5f9924b324c2d.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/5702894.pdfIn PDF document text
    • https://gujidasudaximuv.weebly.com/uploads/1/3/4/3/134384457/ziseforivib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2730/0036/files/skyrim_safe_storage_solstheim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0126/5566/files/16753424226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8874/3062/files/skill_bike_technogym.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/vuzalajulumoxan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/81748854918.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EC 4604 bytes
SHA-256: 9ee48a4d6f8c45157f87dcf04425ef4a50dd4c1a4b2ac4cb81ab109d583b923f
font_01_sfnt_off0000909c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 11060 bytes
SHA-256: 9e35b1d5df172342d4395c55f5cd88421e7d93bdf6fe8f5e113162dab105b31c
font_02_sfnt_off0000b651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB651 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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