Malicious PDF — malware analysis report

Static analysis result for SHA-256 43391fb5b481d2a9…

MALICIOUS

PDF

46.6 KB Created: 2020-08-18 19:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70f38173bc2ad445b0897ae03aa90958 SHA-1: d8aea71cb4102b05ec38d5206d164886c6f3eb62 SHA-256: 43391fb5b481d2a942fdbadff17a548e6f11640a1d949896cd228ed8dd704a4a
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 known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The primary intent appears to be SEO manipulation or user redirection to malicious sites, rather than direct exploitation within the PDF itself.

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=training+guide+maplestory+v83 In PDF document text
    • http://xotirezu.azitopaving.com/uploads/1/3/2/6/132682555/1503814.pdfIn PDF document text
    • http://lakoga.valentinelodge.net/uploads/1/3/0/7/130739423/pelavetopelusovubuz.pdfIn PDF document text
    • http://files.hydronicspecialtysupply.com/uploads/1/3/1/4/131438490/6355709.pdfIn PDF document text
    • http://fizinu.capitoloperarichmond.com/uploads/1/3/1/4/131437423/3492141.pdfIn PDF document text
    • http://files.jessieleethetford.com/uploads/1/3/0/9/130969054/surolikasuxawudufu.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/1/0431/1918/1978/files/agua_de_beber_partition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/guzajedimujitaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/puridexerobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/flipkart_guess_what_answers_today_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/face_recognition_attendance_system_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/h_s_letter_love_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/blind_2014_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/varrock_medium_diary_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/nuwox.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

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B4 5748 bytes
SHA-256: ff61e7650a99c52ff1b8038a621f81a520930a0be2858d0ae85ef98684ddb2e1
font_01_sfnt_off00008937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 10736 bytes
SHA-256: 7fc74a1bb8d2531baa9ef49f88fe069f8e6653cb39ab64145d779e4ff9ebb784

Open this report in the interactive analyzer, or submit your own file for analysis.