Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db5e4eafee001ab…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 01:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40c937773eb08a7abe715c89ee78f3d1 SHA-1: ce028c1e55f3cc38d5257586107b824e64b5ac68 SHA-256: 8db5e4eafee001ab71ddec09163400d3a56f4124626919428297c15db586b21e
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm and another flagging a link to a known malicious redirector. The document body itself is largely unreadable, but the presence of the malicious redirector URL suggests an attempt to lure users to malicious content. No scripts were extracted from this sample.

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://ttraff.ru/pify?keyword=afmg+ease+manual In PDF document text
    • http://files.melissarae-photography.com/uploads/1/3/2/6/132681308/1928638.pdfIn PDF document text
    • http://files.hubcapanniepky.com/uploads/1/3/1/3/131379118/tomafu_kogifibamewiro_lexom.pdfIn PDF document text
    • http://juzubif.metalwitchh.com/uploads/1/3/0/9/130969761/rifagoxemixetej-refosokodusite.pdfIn PDF document text
    • http://files.katprimeau.com/uploads/1/3/1/4/131407692/6436089.pdfIn PDF document text
    • http://lofumoj.smithpoolservice.com/uploads/1/3/2/6/132682076/norezekedejozoz.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/1/0431/3926/8774/files/48205402774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/us_passport_renewal_name_change_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2783/9641/files/fojitivosofigexol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/70255686383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6434/5247/files/83832132840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/62416281576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6094/5305/files/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/jezibixubevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/factors_affecting_biotransformation_of_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/16658885627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/abbyy_transformer_3._0_full_trke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/11455546301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/selenium_webdriver_java_api_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/wimegomi.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_off00005e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E24 4624 bytes
SHA-256: 3716715f29d5f67c34777dc3838d7c6d4068c1082f3614b5689a172cb09861ce
font_01_sfnt_off00006dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 11388 bytes
SHA-256: 7f06226e46eabf32a51e706ca39dcbd678ee327b6fe5c6694961d500fa7f36ad
font_02_sfnt_off00009280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9280 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71