Malicious PDF — malware analysis report

Static analysis result for SHA-256 152a69b623da174a…

MALICIOUS

PDF

35.2 KB Created: 2020-08-08 10:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ec659c329e2c92d4d15cd89aaf39774 SHA-1: e28812d0098d4991f05b72b7071c947ce9a38c40 SHA-256: 152a69b623da174a96afd784d14bc34dbb7c41748a34fab872bf1a0a25df7bef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at 'https://ttraff.cc/pify?keyword=logical+assumption+exercises+pdf'. This indicates a phishing or scam attempt disguised as a document download. The ML classifier strongly supports the malicious nature of this PDF.

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=logical+assumption+exercises+pdf In PDF document text
    • http://files.zulfiamade.com/uploads/1/3/0/7/130739616/6204767.pdfIn PDF document text
    • http://files.thelegocasestudy.com/uploads/1/3/0/8/130814630/5956506.pdfIn PDF document text
    • http://files.stpaulpensacola.org/uploads/1/3/1/1/131164573/2034725.pdfIn PDF document text
    • http://files.lightninghill.net/uploads/1/3/0/7/130776208/6a10decdc.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/1/0436/1617/4243/files/limawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/85437157525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/39505297400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/31738798517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/padaziwisiwibixuxoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/playground_sessions_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/59284249305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/gitojoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/mechanism_of_muscle_contraction_and_relaxation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7697/6791/files/doparax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/zujalig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/29360720617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5063/8229/files/traditional_payment_system.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_off00004ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 5484 bytes
SHA-256: a07fa045644034b6e1a91080dd4d583465d4594033e493c9f6f9eda4509c1d99
font_01_sfnt_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 10368 bytes
SHA-256: b16abea1fb6e1e2c32ee6fffd869c450a0af577b988528d0c1d8e76e38ccd273

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