Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb53cbf82199096…

MALICIOUS

PDF

35.4 KB Created: 2020-08-06 13:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ade9585178d391070fcc5bf3b62444b2 SHA-1: b5aba1bf6a33654867df15016e2725b770560fb7 SHA-256: 9bb53cbf82199096657835baa471b6372b3755ac000069c08b2b0e098af3816e
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains text suggesting a lure for a 'vocabulary answer key'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits. No scripts were extracted, and the PDF structure itself is the primary vector for the attack.

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=boost+your+vocabulary+2+answer+key+pdf In PDF document text
    • http://xigopob.icptraining.co.za/uploads/1/3/0/9/130969368/wowevipagitepor.pdfIn PDF document text
    • http://files.hammerheaddfs.com/uploads/1/3/0/7/130776644/41eaf28c8f845.pdfIn PDF document text
    • http://files.koaguitarsets.com/uploads/1/3/2/6/132681460/5bfb906f52.pdfIn PDF document text
    • http://files.designsbysarahmeyer.com/uploads/1/3/1/4/131437139/d49d002b3c4b.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/1/0432/0083/9841/files/tofilokametetaniri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/litres_to_gallons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajotoliwafugesekediriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5413/6473/files/nios_deled_registration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/10765908738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/tunudiperexibupalajelule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/xetixefixagarosed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/10729295724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/bagezijotokubew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/66560452176.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 7

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_off0000462e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x462E 5788 bytes
SHA-256: 847941d1e0a765194cae806f526a9315da12c5f30c758a3f6be8754ee8ccbf0d
font_01_sfnt_off00005a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 14684 bytes
SHA-256: 607efe10aa730219eb82061740d9a6b6946961038a3da8b6f2d9418a23866238

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