Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7182fcf99a218c…

MALICIOUS

PDF

55.3 KB Created: 2020-11-01 08:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 10a7cb4e29af78a8340cd4ba4bc4d862 SHA-1: 9bd51725b1453056e18e7df0b94f4f52b8e229ed SHA-256: ea7182fcf99a218c77bf1a23884098999e152f66b0a02d53dd955404b8446bd5
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it's a malicious redirector and part of an SEO link farm. It embeds a link to 'ggtraff.ru', which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains the URL and keywords that likely serve as a lure for users searching for 'William Blake tiger poem pdf'. No scripts were extracted, but the primary attack vector is the malicious link.

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.
  • 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.
  • 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/123?keyword=william+blake+tiger+poem+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f90ede75de8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5f958bedd2115.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/5945091.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://s3.amazonaws.com/rijaliwiguvex/kdlinks_a300_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f305f5-5225-4a3e-a856-5f7163888ac4/4899040362.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/buvitifidetojerajofax.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/89112592979.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/88786567157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268fd9e6-d742-4a09-b68b-8422bd9f53a6/xezufujiziwotujejodak.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/keto_diet_and_diabetes.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7E 5080 bytes
SHA-256: a2d831fe6364dc05cd2c65add5b2a0a9a142a8e5e8a06e80da0559b012d180c7
font_01_sfnt_off00008cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD3 11300 bytes
SHA-256: a92132408e4e21f27c49541e7eda768cbf770c2fa77ea42daed08dd4549bb382
font_02_sfnt_off0000b2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_03_sfnt_off0000c0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A6 6084 bytes
SHA-256: fe2fcb21638d77a13ab5a0035f1ec4ff1483f61d84902e7352c885bc49d79dd3

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