Malicious PDF — malware analysis report

Static analysis result for SHA-256 027f196030b02cd3…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 17:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db870dbae21362d9f4f6893af4d1d696 SHA-1: 7205d2bcf8561e877b1dbbf7109c3ab3ee9e713a SHA-256: 027f196030b02cd3dc80fa9f0ae206e3af0717622b60b6a5bbb7d6fab0dfb8f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector, disguised as 'acca f2 course notes pdf'. This suggests a phishing or scam attempt to redirect users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=acca+f2+course+notes+pdf In PDF document text
    • http://sudezufaz.owlingdog.com/uploads/1/3/1/4/131407089/repabugobegivusijudi.pdfIn PDF document text
    • http://files.penrithicepalace.com/uploads/1/3/1/8/131856877/lawowalalafaxopiroj.pdfIn PDF document text
    • http://files.fertileground.info/uploads/1/3/1/0/131071256/ragosadobu.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/1/0429/1615/1455/files/wonajerigixulupino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/twitch_moderator_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/74553818037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/the_literature_book_big_ideas_simply_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2159/0951/files/zemiwakiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/miwubarorazezaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/fuzirosibanefimasiwawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/24941090511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/19850356842.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_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5240 bytes
SHA-256: 1e9831fe0535af63e03b6009155ded23c9b9601ae55fdc43f7a82c6fb833fffc
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 10284 bytes
SHA-256: 78151de2cd10f27776c09f56d407691fc11a61463330d5af3eb5e72f34545152