Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3b5c85cbdfff6c…

MALICIOUS

PDF

43.6 KB Created: 2020-08-27 17:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c950895af5616b3292038f94fd7b016 SHA-1: 7a1404a4c266fc04efe0c813ec83344e87638cd9 SHA-256: bf3b5c85cbdfff6cedda08f176088bcd5d2668f55f7e50332c616b8a50377594
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as information about Illinois state corporate income tax rates. The link points to `https://ttraff.ru/pify?keyword=illinois+state+corporate+income+tax+rate+2019`, which is flagged as malicious. The document also contains a large number of external PDF links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates 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.ru/pify?keyword=illinois+state+corporate+income+tax+rate+2019 In PDF document text
    • http://files.ashwoodfertilitycare.com/uploads/1/3/1/3/131379099/tozawilefuru.pdfIn PDF document text
    • http://files.peculiaritypress.com/uploads/1/3/0/7/130740044/e21756.pdfIn PDF document text
    • http://files.womensclubofpittsford.org/uploads/1/3/1/3/131380842/4309723.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/1/0429/3633/6551/files/fds_acide_sulfurique_98.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2504/7463/files/dnd_5e_artificer_revised_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/38919139247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4541/9170/files/pukusifulovajinakotasabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/37596320775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/wupujov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/fotonirun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/dtu_b_tech_application_form_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2985/6155/files/sidamuzokuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/la_pasion_segun_antigona_perez_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/72954736302.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC7 5568 bytes
SHA-256: 6490cf846f987c5f1b7919048dfa5f5ed602ebea6c2072d8c7f33095ac26686a
font_01_sfnt_off00007d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 10420 bytes
SHA-256: 5cab4e0f5545b07a74b8934004b62f51b7d31498e1c93fd705b8d060b652effb

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