Malicious PDF — malware analysis report

Static analysis result for SHA-256 53539d4badf23a33…

MALICIOUS

PDF

36.3 KB Created: 2020-08-10 14:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86a9c1e56346170be4e8f9eff9114ec8 SHA-1: b7d93145a4087f7d886dc054690c7d1f3c88c10c SHA-256: 53539d4badf23a330858bbdfeebd9ec040e8af420eb14ffafc74756519327451
214 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an ebook, which is a common lure for phishing or malware delivery. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link points to known malicious infrastructure. Additionally, the 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam context, although no phone number was explicitly extracted. The document body, though heavily obfuscated, contains the malicious URL.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=analytic+geometry+ebook+pdf In PDF document text
    • http://files.ventergallery.com/uploads/1/3/0/7/130774990/bewexivojuzoko.pdfIn PDF document text
    • http://files.kuroshgallery.com/uploads/1/3/0/7/130775032/1045509.pdfIn PDF document text
    • http://files.elkhornvalleyhrc.com/uploads/1/3/0/7/130775466/f328c8.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/1/0429/6137/1290/files/brazzers_account_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/mappa_bardonecchia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/45722579886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/ielts_speaking_makkar_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/2003_saab_9-_3_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/critical_thinking_questions_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/english_horror_story_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/avadhuta_gita_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/pumejosolijisewodeteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/gevaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/closed_form_summation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dobemajafapurotexujebo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DBF 5592 bytes
SHA-256: 800f15822e628af8baccb4d268ab8fd9cd08a09861ce305e7138fc87e7636155
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 10044 bytes
SHA-256: 58953db4647706b2c22dd544490f80d7f2b780ed99002181586a20c1f9d92f2c