Malicious PDF — malware analysis report

Static analysis result for SHA-256 83dac771fd40252b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 20:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dad127e26ed1f11066cae9c0b0aff452 SHA-1: b523035a23204930357a09e427d186ddf3342f3a SHA-256: 83dac771fd40252bf026aabe610a565eb1589dfe82d3505d5d9eb33febce15c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a phishing or SEO spam campaign. The document body, though heavily obfuscated, contains text related to "cash flow management techniques pdf" and a URL that appears to be a lure. The presence of multiple PDF links and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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=cash+flow+management+techniques+pdf In PDF document text
    • http://files.domaplasma.com/uploads/1/3/1/1/131164534/gifuwubumip.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/1/0436/2846/2233/files/rekt_not_rekt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8937/1040/files/garipameb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/barmer_patrika_today_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/cepacaina_spray_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/49928494724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/75720311280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/61038869983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/xuzezikibexolasozurupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1955/files/84774827829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/pearson_algebra_2_common_core_teacher_s_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/62921796284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/52114455075.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_off000067ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5596 bytes
SHA-256: a4d8af84d4a3d8218fb77759d4d5411c2046a7557c02c777a2807dc85659170d
font_01_sfnt_off00007ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE1 10356 bytes
SHA-256: 6f88fa956eb1cd9aa92643a47dd7af0d29db02108d7e772f876a61439c313e2e

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