Malicious PDF — malware analysis report

Static analysis result for SHA-256 e898bb52aa4123aa…

MALICIOUS

PDF

46.2 KB Created: 2020-08-13 23:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e244e0ab6200fa5443bdfc51b8cceaee SHA-1: 05d6ab35df37082f3e64a4ab94ac3af68a877d3d SHA-256: e898bb52aa4123aa7e16a911a45ec317759d690091b8a10632bef5876697c15e
202 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text and embedded URLs suggest a lure for downloading a 'free PDF reader', which is a common social engineering tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=best+ad+free+pdf+reader+for+android, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=best+ad+free+pdf+reader+for+android In PDF document text
    • http://files.afmsptsa.org/uploads/1/3/0/8/130814121/5791738.pdfIn PDF document text
    • http://files.businessrescuene.com/uploads/1/3/1/4/131482954/xaguneperuda-puwejonawup-kugokiwadim-petiwabuvinemet.pdfIn PDF document text
    • http://lufivo.superiorarmorworks.com/uploads/1/3/1/0/131069934/rakejivub.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/1/0440/7446/7478/files/hand_lettering_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8407/0558/files/aromatic_substitution_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/multiple-_step_income_statements.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/diwerirelazizimapuxubavox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/zizuzipodumek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/togevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/arris_tm1602_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/manudeganelufituti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/7497640160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/82945839528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/barron_writing_for_the_ielts_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/zesovajusozijenetuw.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 5

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_off0000771d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 5052 bytes
SHA-256: 1f9ad1e373ff6a4a15ed6a7b268c81749cba998a224e1931349eb2f9694faf30
font_01_sfnt_off00008857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 10416 bytes
SHA-256: da2a4c8b9069fa6f5156e952f4f16812f82096bc1e08240ff7ee882d12e2b0a5

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