Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93193ae51b328d6…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 18:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38b6b049a11c7c3f671906a50def92e7 SHA-1: c838c812ad0eb9d4d0539b6c1c43ae5b26a6c779 SHA-256: f93193ae51b328d63ba8963e4ef7d329d66ad24a02ba6fcef6bab8ebe0c4dbe2
234 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 of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link, however, leads to a known malicious redirector at 'ttraff.ru' with a search query for "certificate templates microsoft publisher free". This indicates a likely phishing or malware distribution attempt, leveraging SEO tactics to appear legitimate. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=certificate+templates+microsoft+publisher+free In PDF document text
    • http://files.dats-il.com/uploads/1/3/2/6/132682171/fefute.pdfIn PDF document text
    • http://rumun.privatecounsellingandmediation.com/uploads/1/3/0/7/130775565/6f575.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/1/0432/8561/0654/files/51699223578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/51459559132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/environment_agency_culvert_design_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/calidad_de_vida_en_el_trabajo_juana_patlan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/58981715163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/gotivurijepuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/alone_heart_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/9216826055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0487/0305/files/metabolomics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/11156270839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/4883311643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/1087877247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/8379525862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/wezisexufujisemevoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/how_do_you_cheat_in_cookie_clicker.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_off0000677a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677A 5300 bytes
SHA-256: 39fe862bea8a28c89954dac890dff4a9bb80c48b1ad4f4fafb6af0453791d530
font_01_sfnt_off0000794d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794D 9792 bytes
SHA-256: fe944f4e5ed6d861a9781c44b438753b19c2c03136a09e5c952ea4a95c363791