Malicious PDF — malware analysis report

Static analysis result for SHA-256 9862f53e1ef5a017…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 15:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16ea87e8650c09b8b511ae70fe438585 SHA-1: ee8bc80eacfc22a5f0b1480d6f0ba5538ba2a3fe SHA-256: 9862f53e1ef5a0176db7c33a471124e06f67bf16486708acd869d2212f85828e
202 Risk Score

Malware Insights

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

The sample is a PDF containing numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to accounting terms and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a high likelihood of leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accrual+basis+vs+cash+basis+pdf In PDF document text
    • http://gifapigu.dare-h2020.org/uploads/1/3/1/6/131606289/fisavaxaxupez-xaruj-bipemuwogi-subefimawajujo.pdfIn PDF document text
    • http://takuzin.thestadiumview.com/uploads/1/3/2/3/132303382/xozibijodifawelupuj.pdfIn PDF document text
    • http://files.nrityayogsutra.com/uploads/1/3/0/9/130969204/0b60a95815404a.pdfIn PDF document text
    • http://files.paulsfranchiseleague.com/uploads/1/3/1/4/131438249/kabuvoxije_kuvorenuzixuw_raxejusub.pdfIn PDF document text
    • http://sikizos.anniesshineandsparkle.com/uploads/1/3/0/7/130738714/3157006.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/1/0431/2901/2381/files/bozuxufuvupimonaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/fudepirojokabuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5406/4028/files/23801607171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/anemia_peru_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/40367427960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5550/4794/files/56993437660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5913/7951/files/conflitos_no_ambiente_de_trabalho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/83937550283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/design_diaries_creative_process_in_graphic_design_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7657/4620/files/85863344895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/19887168063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.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_off0000705c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 5432 bytes
SHA-256: 70344bcf55d30358886480aeed93ebed3332cb2dfa993506893e8ec19b41709c
font_01_sfnt_off000082cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 10160 bytes
SHA-256: 04589fbb53dd2f35ddbc5cfd23e1230d2148de414fffee3757e39dd03123d402

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