Malicious PDF — malware analysis report

Static analysis result for SHA-256 1494632ac858bc52…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 21:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e1a09826b82f26582a9c4fc338e5e0e SHA-1: 39f7e930a9dba2e91fd031bd11eadaf5055fb11f SHA-256: 1494632ac858bc5221ae29fce42b5c2f8f5b4b2e2f77c6e665f32ab34739db42
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to a known malicious URL, identified as a redirector for phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting it is a lure for an assignment, likely to trick users into clicking the malicious link. 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.cc/pify?keyword=assignment+first+page+format+pdf In PDF document text
    • http://files.andersoncontemporary.com/uploads/1/3/1/0/131070313/800079.pdfIn PDF document text
    • http://files.stephaniecpassman.com/uploads/1/3/2/8/132814935/6747640.pdfIn PDF document text
    • http://babik.brennansrisirikul.com/uploads/1/3/1/6/131606056/sivozufupotopap.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/1/0428/9966/9151/files/papikanavuvus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/80838192497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/nogabuxuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/70561789191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/29637105157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/mabilozafabuzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/xixokijegudolexazeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/57342962089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/72406829182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/jujinedida.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 4

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_off0000ae32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE32 5320 bytes
SHA-256: ee5293c4f43ba71ab2d386b5710cc5130aa8a4d5c52103a35c1372e438786592
font_01_sfnt_off0000c033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC033 10152 bytes
SHA-256: d72e7f4e5bbfd10d135404ef6f84aa77acf7511ff2d7869c4226fd9c3a89cfd4

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