Malicious PDF — malware analysis report

Static analysis result for SHA-256 2844ef4e17cc2bef…

MALICIOUS

PDF

44.0 KB Created: 2020-08-09 23:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c916fc1826fdcc359e821e332fcabebc SHA-1: 4a5a0651ac2ba0722b85ab923d9ad99999cb3a07 SHA-256: 2844ef4e17cc2befe518eff9ec15d0829c26f5a499873f0e802c7f7b079ab750
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially obfuscated, includes keywords related to a 'Briggs and Stratton 500 series 158cc manual pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=briggs+and+stratton+500+series+158cc+manual+pdf In PDF document text
    • http://files.spaflourish.com/uploads/1/3/1/6/131606901/55b1e67f.pdfIn PDF document text
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdfIn PDF document text
    • http://jeridezip.cocktailsntunes.com/uploads/1/3/1/8/131856772/kadejijipex_mobis_japen_bufevulusuna.pdfIn PDF document text
    • http://files.masksoflove.org/uploads/1/3/1/6/131606331/xodutoxusamaduriv.pdfIn PDF document text
    • http://files.truromass.org/uploads/1/3/0/8/130814716/momizo-mufero-nuzaxevo.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/1/0435/3628/5860/files/fakumab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/salujorip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/john_deere_stx38.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/assam_up_tet_question_paper_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/zesexopizegeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/33163832194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9613/6098/files/gepoxavedobonomova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/wetap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/77831397423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/salud_y_ambito_laboral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/astm_b117_18_free_download.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 8

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_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 6036 bytes
SHA-256: e7d8423560bfc4e18c14ac4a93ad4390867bb75fd49635c5ed90ef6a4f23bc6a
font_01_sfnt_off00007f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13 10260 bytes
SHA-256: 056492548784d5012868884d34d64c386da4ff5c068823531022ba7596d5aac7

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