Malicious PDF — malware analysis report

Static analysis result for SHA-256 a943d8ad47347648…

MALICIOUS

PDF

32.9 KB Created: 2020-08-24 12:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26aab8b9600eb51d84093e6067519bf0 SHA-1: 55cd1e60ef9a95275b9759cecac04b92ffef7b58 SHA-256: a943d8ad47347648c9649e7a72440af15cb6a50d08e29ddaf92bf6aea0f2f82f
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body text and embedded URLs suggest a lure related to 'format xml data online'. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=format+xml+data+online', which is likely used to redirect the user to further malicious content. 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.ru/pify?keyword=format+xml+data+online In PDF document text
    • http://dexidoro.isolahandmadeoriginals.com/uploads/1/3/0/9/130969521/4480132.pdfIn PDF document text
    • http://files.serpentinecommunitygarden.org/uploads/1/3/1/4/131437283/3904caee286b29f.pdfIn PDF document text
    • http://jitig.hirethespires.com/uploads/1/3/2/6/132683071/bumujozevuxej.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/1/0432/7351/9272/files/70364784108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/cetogenica_dieta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/fegijifopega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/nizogizesifilebatiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/sqlite_insert_into_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9141/7505/files/equivalent_fractions_worksheet_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/xobikibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/jovejololarireb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4024/1829/files/blank_venn_diagram_template_microsoft_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3152/files/16332220376.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_off00004497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4497 4816 bytes
SHA-256: 565073cfc94a6cc63b439a1f4d273fd8afdc52b283756cdfc45197acff2dd37e
font_01_sfnt_off000054df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54DF 10008 bytes
SHA-256: ae8f5741c0acda38eb26e48ab7ae46ab0022846947ad8f8c8ef4eb3ebf4c076a

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