Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabaec51a73f9af7…

MALICIOUS

PDF

38.1 KB Created: 2020-08-08 08:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed6b729bf23618f0e18ff76c5c028417 SHA-1: 395aec4497cd6480f27604e692ae4091db2cd081 SHA-256: aabaec51a73f9af7ca9d0acf78c008e5f00763c394f96140f510d9e012dfa45f
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are disguised as legitimate documents, to a redirector service. The primary malicious link identified is https://ttraff.cc/pify?keyword=brick+masonry+design+pdf, which is a known malicious redirector. The file's structure and content suggest a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure.

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.cc/pify?keyword=brick+masonry+design+pdf In PDF document text
    • http://files.henrikbechseeberg.com/uploads/1/3/1/1/131163578/supaj-rutubiforol.pdfIn PDF document text
    • http://files.middleschoolmind.com/uploads/1/3/0/8/130813796/regiwe_kijeja_pozux_fiwuli.pdfIn PDF document text
    • http://nutigude.cvcanoeracing.ca/uploads/1/3/0/9/130969352/6f74d.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/1/0437/1342/9655/files/fundamental_of_c_programming_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/biochemical_test_for_fungi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/financial_management_brigham_14th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/libinuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/55051397775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/85892182484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/gevilurujakejupoxaxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/poker_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/bacterias_gram_negativas_e_positivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/24851252867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/29458863636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/89954816538.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 5

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_off000056ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56ED 5656 bytes
SHA-256: 6ea00d540f9aa2654a3f6d5352dad28899992905e3480c1d7a7220b285dc8c12
font_01_sfnt_off00006a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2C 9756 bytes
SHA-256: f599349fe6bd4f4e1baeeda3d4c8bebe35b8058948525f8fa74cdfbe0955fd00

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