Malicious PDF — malware analysis report

Static analysis result for SHA-256 021858804a8f3b5e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 09:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 438198265cc6bf291d6edab09a632209 SHA-1: 0b4dffbbb0a6e382d1750cffabb679b6c751042d SHA-256: 021858804a8f3b5e1ea563f0fc7a1627a1c9abfe30560ed711dcde6b81e4af2b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary redirector identified as 'https://ttraff.com/pify?keyword=computer+security+checklist+template'. This redirector is flagged as malicious and used in a link farm, suggesting a phishing or scam attempt to lure users to download further malicious content. The ML classifier also strongly indicated 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.com/pify?keyword=computer+security+checklist+template In PDF document text
    • http://kanepi.ciecanswers.com/uploads/1/3/0/7/130740235/0f9e0bd.pdfIn PDF document text
    • http://files.mariamilios.com/uploads/1/3/1/4/131406153/3913734.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/1/0433/8683/0998/files/50443410667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/getumokozuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/definition_of_osha_reportable_injury.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/7269/6999/files/brche_bungen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/debussy_arabesque_2_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3020/files/jexujunudos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/boiler_control_systems_engineering_second_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/91365120500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/kedikiniberij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/8492448190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/comparative_and_superlative_adjectives_exercises_for_beginners.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 1

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_off00006a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5244 bytes
SHA-256: c8f490b8498ac9f4414853293a5a8f941af86e299d36119cda8b435823dd59b3
font_01_sfnt_off00007bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEC 10028 bytes
SHA-256: 087fb48543a4d8bad9640e26a5f87ee6f924098bdb6689ab6bbd1181876f58b9

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