Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4356ca47912d935…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 11:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80f7b66ee6d8aa72050d5a90748bcb76 SHA-1: cb3a1a3a643cc28d1e6789e939eaf53aa71e43c7 SHA-256: a4356ca47912d935d28269a76e4d98a35e73cdfdec4e03aa528ada9fcd2804fc
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link leading to a redirector. This redirector is associated with a lure for 'dictionary accounting terms pdf', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous links points towards a link farm or SEO poisoning tactic to distribute the malicious payload.

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=dictionary+accounting+terms+pdf In PDF document text
    • http://files.secretpriceofhistory.com/uploads/1/3/1/4/131453674/6b6b7f57c.pdfIn PDF document text
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdfIn PDF document text
    • http://xatiwowo.jmagalskiphotography.org/uploads/1/3/0/7/130775732/suwupaf.pdfIn PDF document text
    • http://gelejija.healdsburgweddingflorist.com/uploads/1/3/2/8/132814964/1da36ad30a9.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/1/0431/8072/0294/files/sipujowazikozuvemokunul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4178/2950/files/52788483555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/biology_miller_and_levine_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/witisagurasoful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/bad_habits_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/pm_awas_yojana_online_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/kcet_online_application_form_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/70013105665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6704/9893/files/printable_lowercase_alphabet_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/79321669859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5261/files/reported_speech_exercises_advanced_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/brosur_kabel_nym_supreme.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_off00006c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 5544 bytes
SHA-256: 7dfeff2befba16a5e9e4998ef1a43d9553ea210d363512d4d1f0b39dabb831b1
font_01_sfnt_off00007f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 10128 bytes
SHA-256: 9989df73231fe95e1a52fd676e9be49e4891e8408fcc86e4f8da53f1e1fc458d

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