Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aea721fe7b223d6…

MALICIOUS

PDF

49.2 KB Created: 2020-08-09 07:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a0e5badf5d3d9c88f8714c363aa2cf4 SHA-1: ad0352fa24e347d20269cf443a06ad3f4b0e666c SHA-256: 3aea721fe7b223d6ba2d1767d52a1eeeabc702501a1e26c12ccb3b3a48cfebcc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, which is characteristic of a link farm. One of the primary links redirects to `https://ttraff.ru/pify?keyword=types+of+cement+produced+in+ethiopia+pdf`, a known malicious redirector. This suggests the document's purpose is to lure users into clicking malicious links, likely 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=types+of+cement+produced+in+ethiopia+pdf In PDF document text
    • http://files.mrmckeebysclass.org/uploads/1/3/1/3/131383942/sexowowufizibu.pdfIn PDF document text
    • http://files.johnjonespe.com/uploads/1/3/2/3/132302824/mutigo_mubaw_wataz_lemitelixero.pdfIn PDF document text
    • http://files.accianiengineering.com/uploads/1/3/0/7/130739069/kadasisikotivaf.pdfIn PDF document text
    • http://files.dj-orbit.net/uploads/1/3/1/3/131382430/1284156.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/1/0431/0253/5840/files/52350598316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/32900720566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/vasipejudisibinoruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/download_access_database_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/92690970190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/wogixusulob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1961/5904/files/minecraft_hunger_games_animations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/vojukigodax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/what_is_value_added_tax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/xasemuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/methods_of_genetic_engineering_in_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/36736284926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/continuity_equation_in_cylindrical_coordinates.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 5416 bytes
SHA-256: 470c4dadcd9fa74f3cb580b88ce47ed8b424c6078146ac9a6eb34048e5996871
font_01_sfnt_off000093b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B1 10472 bytes
SHA-256: 04f5abeb839a39b14e3399392949fd4055dd034324fde98b172ff297f81391a5