Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c832cc8e44c909…

MALICIOUS

PDF

32.7 KB Created: 2020-08-24 08:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92edc8bc02d8559df742a55bdfe3a728 SHA-1: 104c053f39f3c25b633dbccf5cc3a954d0d92bdb SHA-256: 88c832cc8e44c9093ee69317395121f63f8b4cae35788350b2f9bd7462abff75
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service, identified as a malicious infrastructure by heuristics. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into visiting a malicious site under the guise of a free PDF download. The ML classifier also strongly indicated 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.com/pify?keyword=something+somebody+anything+anybody+exercises+pdf In PDF document text
    • http://loxole.calzadoleonsr.net/uploads/1/3/1/8/131857914/fajigitividu.pdfIn PDF document text
    • http://files.inspiredemocracy.org/uploads/1/3/2/7/132712093/vaminov.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/1/0463/0645/9810/files/rirolupakovorovom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/brandon_grotesque_free_font_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/dovusirarotifaxemavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/17724176773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/lutarivanokomakota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/advanced_vocabulary_words_and_definitions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/68456784408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/11493172678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/90358266765.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
🗂 Part of campaign: bbbstraighttalksports.com 6 samples

Related samples 3

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_off00004244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4244 5948 bytes
SHA-256: 7fc955441a61f8701984694b0d9c399f03324b77c2d1fb871b5e1804bcd86bfa
font_01_sfnt_off00005663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 9344 bytes
SHA-256: 63db56e8d1922e62edab86906f800bf1b10a099c296d31414da18f15b4ab40f9

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