Malicious PDF — malware analysis report

Static analysis result for SHA-256 210905cd5a7ef286…

MALICIOUS

PDF

49.2 KB Created: 2020-08-24 03:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d31009a7c8795065636117a9a981459 SHA-1: d3c984a05dba0335474f812bb591669afa1ec072 SHA-256: 210905cd5a7ef28680f3476ff1625d4032928e396481623e3b6090bb164a3d58
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a mass external link farm. One of these links, 'https://ttraff.cc/pify?keyword=format+code+html', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users 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=format+code+html In PDF document text
    • http://files.michelledmeacham.com/uploads/1/3/1/3/131378943/lofuporitifem.pdfIn PDF document text
    • http://piribag.brynsion.org/uploads/1/3/0/8/130813780/55526e45e2030.pdfIn PDF document text
    • http://pomid.rivendellschool.com/uploads/1/3/1/6/131607095/sojemajarut.pdfIn PDF document text
    • http://zumezumo.mosaico.ch/uploads/1/3/1/3/131380213/3b4214529aa3a0.pdfIn PDF document text
    • http://bovofev.nbblackhistorysociety.org/uploads/1/3/1/3/131383839/xufipu_jowufagodedot_numod_xatunalotudimet.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/1/0432/3803/1518/files/kotisuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/13177804817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/81301806831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/lepuvifumikikuzomolig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/novogokumodevafid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/1779259654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/94640204228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/cisco_ccna_lab_workbook_200_120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/zefulasikazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/awana_theme_song_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/4599/5932/files/76893997868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/weekly_meal_planner_with_grocery_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/11537466471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/56190017913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/rigogajusaj.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_off0000682e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682E 4956 bytes
SHA-256: 99e347119fca23f447aa75cd8a8f9016855070be3cb9288e9f6c4923692790f5
font_01_sfnt_off000078d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 22632 bytes
SHA-256: f48f5f7e9980a01e6d2a3f304ba4514e31eea9621e78ebcc6310eb210d7d628e