Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa0f9d40a7d8428…

MALICIOUS

PDF

33.0 KB Created: 2020-08-06 23:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28f4c2406f7509890daa7319bd24953a SHA-1: 37dbcb62c7bb45109872e465e4917506140de7f8 SHA-256: 7aa0f9d40a7d8428cb34e9d241af6393914c46d04e13797f0630530adee28cda
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service that ultimately leads to malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Princeton review books pdf' and includes the malicious redirector URL. This indicates a phishing attempt to trick users into downloading potentially malicious content.

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=princeton+review+books+pdf In PDF document text
    • http://files.caringaboutquotes.com/uploads/1/3/0/7/130775025/3065572.pdfIn PDF document text
    • http://files.lesmarmitons-sandysprings.org/uploads/1/3/0/7/130739718/jemabisafugikeb.pdfIn PDF document text
    • http://files.artbylaura.net/uploads/1/3/2/6/132695280/xotujarixupam-najobelisa-zirosibe.pdfIn PDF document text
    • http://files.kdyllon.com/uploads/1/3/1/8/131856815/3455629.pdfIn PDF document text
    • http://files.robbiesadventures.com/uploads/1/3/0/7/130738675/55324.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/1/0430/0832/7829/files/32018155264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/tornado_shot_ranger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/28755194868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/pavonoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/47032072567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/talaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/accident_and_emergency_radiology_a_survival_guide_3e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/case_580ck_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/44620757481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/51058234605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/25056988529.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_off0000450d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x450D 5264 bytes
SHA-256: 78680a3b9fadde0a01e6cc57b8c07fec5091dac53bef7fc01b8f94a1afacc308
font_01_sfnt_off0000571a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571A 9400 bytes
SHA-256: b4afbe2c42838072eacd8565b8ebcb5144e5b929eb9bae085c4f0a6076c8136d

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