Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efbbb8f6fae7dca…

MALICIOUS

PDF

47.1 KB Created: 2020-08-23 04:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e96377e1d786aeec5020db8aa1e006b SHA-1: 6aeb760e20e0d6693056a32a6946675175da44fa SHA-256: 1efbbb8f6fae7dca9f22078a474f4955b7afcb4fb22a00749e7753d8dbba97d8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm or redirector strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous PDF links suggests an attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

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=appalachian+spring+full+score+pdf In PDF document text
    • http://befetus.kdwineimports.com/uploads/1/3/2/6/132681670/8a0d7af37b92.pdfIn PDF document text
    • http://files.ayeeprettyblack.com/uploads/1/3/0/7/130738548/3995609.pdfIn PDF document text
    • http://files.skintwalletsusa.com/uploads/1/3/1/4/131405977/bonazovesoj.pdfIn PDF document text
    • http://wakelupu.snapdragonphotographymd.com/uploads/1/3/0/7/130776330/d86965db609f6.pdfIn PDF document text
    • http://nazide.wearemetamate.com/uploads/1/3/0/8/130873804/177287.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/1/0451/8638/4023/files/cartoon_drawing_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/todovab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/states_of_matter_worksheet_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/75596488322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/insta_house_mod_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/chemistry_revision_notes_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/informacion_de_chinampas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/fusavoxopaxuzotejibidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1415/6451/files/que_son_las_bacterias_aerobias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/xobavovunonijawufet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6615/4394/files/how_to_read_english_newspaper_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 5408 bytes
SHA-256: a4f8d9942accfa8e7d58428f11e0d423aec015cf558b231b115fd42420a4da94
font_01_sfnt_off00007777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 10120 bytes
SHA-256: 6e1928f592ba2d9479506cb567f9ac19ae0a7b19aee3bd95017e34483badded0
font_02_sfnt_off00009a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A56 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208