Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15d16411350ad8a…

MALICIOUS

PDF

42.8 KB Created: 2020-10-05 09:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 367546031f1a87e6734f5e4fbafc617d SHA-1: e49fc6714297f97c99b7c4a5af006bf4de16d2e9 SHA-256: a15d16411350ad8aeb7f0a8f375f187a015e93bcc9d29f375ad0ad9bd71d444d
214 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/pify?keyword=a+gift+of+fire+5th+edition+pdf In PDF document text
    • http://files.chawkscatering.com/uploads/1/3/1/3/131380875/e3418a7d.pdfIn PDF document text
    • http://dunag.milfordmillcdc.com/uploads/1/3/1/6/131606490/mewinetazugabi.pdfIn PDF document text
    • http://files.neilmckenzieyouthfishingcontest.org/uploads/1/3/1/6/131606127/1963708.pdfIn PDF document text
    • http://pekozugi.aliceinfinitycosplay.com/uploads/1/3/1/8/131871980/10139a6.pdfIn PDF document text
    • http://files.projectsuperwoman.com/uploads/1/3/1/8/131856398/rolibusizuzolufiwad.pdfIn PDF document text
    • http://files.goldstarenrichment.com/uploads/1/3/1/4/131406202/903960.pdfIn PDF document text
    • http://darifol.brainaneurysmavmcommunity.com/uploads/1/3/0/7/130776225/5f38fb54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8cb8e5-90c1-4650-bf9a-7967479521e6/67731096550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6768179b-04a5-45e5-b088-c937cb3ba6e3/sorumaximereramalubimife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7029b17-bfd9-4356-a547-a21d74cb5f31/vomuxemexosuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0613/1876/files/2040426719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/pogepujivimogopuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8017/4754/files/george_to_the_rescue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/speed_machine_worksheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 4996 bytes
SHA-256: 03c3dfa1dc5f8233243f7656c20be6eae1885908392e94cf1c0267e7e959e986
font_01_sfnt_off00007b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 10232 bytes
SHA-256: dedc4345d70a8874eefb0cc5f16c12cec45c977997c0ff52ea597397cd94dda8