Malicious PDF — malware analysis report

Static analysis result for SHA-256 583d9f78fb5713e1…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 13:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fa4f246a191375858b6a362068393a47 SHA-1: 728c82d29f90e629f857661578d8c7d2570a2e80 SHA-256: 583d9f78fb5713e1fb5a8e4a8f6b69713b6653f90df057d488bbbd21d3ad96ce
194 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one critical heuristic firing indicating a redirect to known malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to 'English phrases' and includes the malicious URL. The primary attack pattern involves tricking the user into clicking a link that leads to a malicious redirector.

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.com/pify?keyword=angielski+podstawowe+zwroty+wymowa+pdf In PDF document text
    • http://files.pmehs.com/uploads/1/3/2/3/132302926/mipujejusonija.pdfIn PDF document text
    • http://files.treeb.org/uploads/1/3/0/8/130873855/nofugafufanavodepiwe.pdfIn PDF document text
    • http://masowowu.walkaboutfarm.ca/uploads/1/3/1/0/131070718/xiterowu_lokarax_bapupebe.pdfIn PDF document text
    • http://zetodivu.michiganmajors.org/uploads/1/3/0/8/130874038/2991370.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/1/0433/0687/7080/files/rapuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/ravarapasanub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/22561385237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/jatedonidogasebufowoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/4844505634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/83811301164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/customizable_weaponry_2._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/56689641298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4642/7031/files/l_aleph_borges_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/34178305433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/48834579277.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
🗂 Part of campaign: chenale-extensionsllc.com 3 samples

Related samples 5

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_off00007140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7140 5656 bytes
SHA-256: 5e9439b74ecea9c9b1c3517998901b8c91284a311f3b8cd4ca4f967873d08663
font_01_sfnt_off0000848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848B 11580 bytes
SHA-256: 7822c5a5714b872a795830dfd1d5770e213be94d9d9b81cd5beafb0e7161e428

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