Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bb5aade03dc18f…

MALICIOUS

PDF

80.0 KB Created: 2020-08-17 10:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b048c32b947a963e414671b2fa6c580 SHA-1: f08a67a3903f48ee93e308ed1a2eecd62daf0b0b SHA-256: b4bb5aade03dc18ff7fd9ad39a9df8411dd828f954c3e189a07a28653049cb9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document's primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=all+flip+flop+truth+table+pdf In PDF document text
    • http://files.studio59live.com/uploads/1/3/1/4/131453213/wipete_nusivexosuwu_xulonawugabot_zirorojojo.pdfIn PDF document text
    • http://files.ajeplanners.com/uploads/1/3/1/4/131406816/sifojopese_nidukuzinagimo_xutokajofuzi_roxurugar.pdfIn PDF document text
    • http://files.thomas-irvine.com/uploads/1/3/0/8/130814831/loniwisutuf-sulas-lomaxesazo.pdfIn PDF document text
    • http://files.redbudpartybarn.com/uploads/1/3/1/4/131437246/45828.pdfIn PDF document text
    • http://files.beaconchurchofchristgbctx.com/uploads/1/3/1/4/131407315/movunivefebufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/guwexosisexumuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/wepuvenaponususeful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/tujadegevofamepiregami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/math_for_economists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/dokoselinaripabovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/sejanatizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/cell_culture_techniques_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7387/1767/files/jera_rune_isaac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4060/4314/files/49404201776.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 4856 bytes
SHA-256: 081f3697153ea57d371f1c21754b7c20f8666173a1f0c74f9108e2d91d00a75e
font_01_sfnt_off0000e137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 14324 bytes
SHA-256: efea94f5e4bb60da2ce2fd138831940526db57275f02ca91518f4b235baf529f
font_02_sfnt_off00010f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 16272 bytes
SHA-256: a1d034c4899da820a17195885c2d76cd6be3fce17d3f1660d9b3805b34643d2d
font_03_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3