Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f0a58ac0e753ab…

MALICIOUS

PDF

44.3 KB Created: 2020-08-03 11:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 433e5d5efa3155986d6f72155d4d160f SHA-1: 606b8cad53bd01de8a04d5eff3078c9f7da2f9b3 SHA-256: 51f0a58ac0e753abe3d3866a5570749d592068cdd829a62df4bcfcc357aee42e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The document body text, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=combine+powerpoint+files', suggesting a lure to combine files, which then redirects to malicious infrastructure. The presence of a large link farm further supports the malicious intent of distributing traffic to potentially harmful sites.

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=combine+powerpoint+files In PDF document text
    • http://files.loriblaylock.com/uploads/1/3/2/6/132681617/vuxajapo-lopalekititinek-xurimidujeri-mopexal.pdfIn PDF document text
    • http://files.thefirmuk.com/uploads/1/3/0/7/130738632/8b21401bc1b39.pdfIn PDF document text
    • http://files.crossingcultures.net/uploads/1/3/1/8/131858540/fesibobasofog.pdfIn PDF document text
    • http://files.kerryfrances.com/uploads/1/3/1/6/131606603/fajege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/comparing_fractions_decimals_and_percents_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/zonirijixunokur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/hkey_local_machine_software_microsoft_windows_nt_currentversion_fonts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/rizufilawefefadasafekap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/53680341604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/dunijamodetowolofosab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7641/8722/files/gumugosubisota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/96314569759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/fifufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/risegajas.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: loriblaylock.com 6 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 4880 bytes
SHA-256: 6a5961ac1c64c18a78f6ca91ba8c56fbfdf1753680e659e63d44120ec54c7d1c
font_01_sfnt_off00007462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7462 9928 bytes
SHA-256: 95fa8c2bbd706a5653ba0e81f095b5fee883d65c5432089aed566c4597944d1a
font_02_sfnt_off0000965c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333