Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aab54af888faed4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-15 06:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ae0f0a3a4c68a9e45572384d9111db4 SHA-1: c57b9073ee106569a5fd0ddb0adb16ecbae6573d SHA-256: 8aab54af888faed40434f0ac5e37b835912f11f444681c327d61b31d122d9884
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 identified as a malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the primary purpose is to distribute malicious links or manipulate search engine results. The ML classifier strongly supports the malicious nature of this document.

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=backsplash+glue+sheets In PDF document text
    • http://files.ladymaeimpressions.com/uploads/1/3/1/3/131379434/ba398.pdfIn PDF document text
    • http://buruwuwi.customglassandgranite.com/uploads/1/3/2/6/132681012/vonudik-jusijima-xejofi-gekese.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/1/0435/5781/4431/files/parametric_design_for_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/baudelaire_spleen_paris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/52825534810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/iobit_game_booster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/free_of_understanding_earth_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/qualitative_characteristics_of_accounting_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/27369292761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/86921169053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/sedewobot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/62420471792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/fovumejakebopew.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 8

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_off00006a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 5212 bytes
SHA-256: 478c16e4759933939c26dabe6df097b394896312fba2f2c9f3cc60aac8860bc5
font_01_sfnt_off00007c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C51 10192 bytes
SHA-256: dbebbea7e19b49aad9950a2579c5bbabb82a49e9b75eaf47e3e5d403bf6938a3

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