Malicious PDF — malware analysis report

Static analysis result for SHA-256 a043d7e176e8d91e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 15:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d52a0c7236c94045ec9eecc1fbd1f365 SHA-1: c4d7aada8452922ae04991619a76d159f971ad9e SHA-256: a043d7e176e8d91eaf60ef775c038c231c0d0f6f1c74b48469252b0c48441744
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains text related to a 'purchase requisition request form template' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness.

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=purchase+requisition+request+form+template In PDF document text
    • http://kalenuni.teaching-entrepreneurship.com/uploads/1/3/1/6/131607712/kegexenive.pdfIn PDF document text
    • http://files.burninroseranch.com/uploads/1/3/1/3/131379899/bagubabavoxexa-xubutuporigasub.pdfIn PDF document text
    • http://sikif.aboutandforsustainability.com/uploads/1/3/0/7/130738870/0ed57b71e.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/1/0435/3484/4059/files/create_gauge_chart_in_excel_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8705/9362/files/19329008156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3964/2015/files/electronics_projects_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/at_t_refurbished_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/86880643126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/dell_emc_storage_nx3240_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9281/9616/files/raganiferenugovunon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/wokasa.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 3

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_off00006254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 5384 bytes
SHA-256: fdc545b37ed4967b1d75b83fd52de3a09db626b6e36e9f41ade3142aa2774152
font_01_sfnt_off0000747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747B 9856 bytes
SHA-256: e61f77692b13c0cd5138e7b2903e3992903e815b1a0039133df585f6085b10c5

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