Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a498cfa9d26dcd8…

MALICIOUS

PDF

44.5 KB Created: 2020-08-23 09:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6177ffceb9aa0fe272ac4d4f7f1fffd SHA-1: 0ae537245037600bc28e868c607e23fc76390402 SHA-256: 5a498cfa9d26dcd85d2a8df483f9e44be26528758b0b0169f3c531b96a289212
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links disguised as resources, with a primary link redirecting to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL suggests an attempt to phish or deliver a payload. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=national+lgbti+health+alliance+inclusive+language+guide In PDF document text
    • http://files.mcfootball.org/uploads/1/3/0/7/130739155/nazufojikuke.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/1/0437/5114/5626/files/google_sheets_textjoin_new_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/euphonium_treble_clef_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/light_energy_worksheets_grade_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/texas_instruments_92_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/basic_tactics_for_listening_transcript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/fasting_bible_study.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/turujeripuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/boogie_woogie_piano_score.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_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 5272 bytes
SHA-256: e05f4e30d300d2f80821c94e6736563b10d4afc473f9dfede9b362efde18542a
font_01_sfnt_off000081d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D5 10472 bytes
SHA-256: adc736a2153c22489ff6db42c88e4b2fd790b6b9a4e325d5d07ba4f07d48913a