Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ff64c31b1c9948…

MALICIOUS

PDF

38.0 KB Created: 2020-08-23 04:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 117e86ff827cdea6126c9b55b2fa980e SHA-1: e0e533bcc5b9fc993ec85f3e1dc0a0b470d1c4c9 SHA-256: 88ff64c31b1c99485fdce9457b4b21a70c84458a07fc0f9ab0220671b0a7eff8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into visiting a malicious website, likely for phishing or malware distribution.

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.ru/pify?keyword=bralette+size+guide+hollister In PDF document text
    • http://wakixewa.montaukmist.com/uploads/1/3/0/7/130775173/ef9977384.pdfIn PDF document text
    • http://files.marthastokoe.com/uploads/1/3/0/7/130738928/gulanesesidakeloj.pdfIn PDF document text
    • http://files.jeanetteschevers.com/uploads/1/3/1/1/131164531/cd97871.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/1/0431/5417/8216/files/110310656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/fupisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/jomulisefiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/50558464345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3747/5225/files/broken_screen_android_phone_data_recovery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/56106680017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/wubenuramisagadumapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/29542747051.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_off0000573c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x573C 5188 bytes
SHA-256: 35df60d16d37e30a1a2a391e0f41e664712dc604d26fa6b7ddf575950f067625
font_01_sfnt_off000068d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D3 10160 bytes
SHA-256: 60a6c38dc07af542d1d1badf5b1723477c3d9d8afbaa246f192b767d864b60b3

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