Malicious PDF — malware analysis report

Static analysis result for SHA-256 b021202450274d39…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 20:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7acf47625b66b1ff812ee9bed9c78aea SHA-1: 852f5d85235aa4d2543ae5b5794e963fcd2ecf1d SHA-256: b021202450274d39cd7f7f5ff00d4745c1bc60745dd7e956c8fd22dfbbeaa02c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains a visible URL that also points to the malicious redirector, indicating an attempt to lure users to a potentially harmful site under the guise of providing educational worksheets.

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=digraphs+worksheets+2nd+grade In PDF document text
    • http://files.carrollspurco.com/uploads/1/3/2/3/132303151/7164254.pdfIn PDF document text
    • http://zugodat.calvary-christianschool.com/uploads/1/3/2/7/132740373/xapezafagasi.pdfIn PDF document text
    • http://jamija.kc-ink.com/uploads/1/3/1/3/131398008/parelovuvob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/keleganojewapoxaxuwanip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/adobe_reader_password_protect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/25787578730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/kujuzujasigojevigepuroke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/9114097745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/atresia_pulmonar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/bsc_3rd_year_chemistry_notes_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/area_and_perimeter_formula_for_all_shapes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/git-_set-_upstream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/ruwebi.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D7 5264 bytes
SHA-256: a9934b14f963e400852fdd2eb532060a1d9dadb20026578103ade0d4111e856d
font_01_sfnt_off000066d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 12472 bytes
SHA-256: 4ec1524e5ef75a311cfded938f65b2ece6bf445e23bee48b4f80fb7625719bf3
font_02_sfnt_off00008e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E66 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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