Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a5a8b67a40879c…

MALICIOUS

PDF

48.7 KB Created: 2020-08-24 20:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d24ff26a38ff0c23f305585aa8c55516 SHA-1: c8dcb29f1265ba89ead8092faf8bc8db6fac1739 SHA-256: e3a5a8b67a40879c6216fb819cb4de730255d27e59ea2d5e831623a53ceb8e1e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body also contains the same malicious URL, suggesting an attempt to trick the user into clicking it for a supposed download. The ML classifier also 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=apocrifos+del+antiguo+testamento+tomo+v+pdf In PDF document text
    • http://mikexot.englishlutheran.org/uploads/1/3/0/8/130874524/2436782.pdfIn PDF document text
    • http://xigir.writeyourfirststory.com/uploads/1/3/1/4/131437774/0c488f03ceaf4a3.pdfIn PDF document text
    • http://files.jira-administrator.com/uploads/1/3/2/7/132710679/vabufifenu-zajipamo-sitamad-vomufifedonuvo.pdfIn PDF document text
    • http://files.kalinkapetkoff.com/uploads/1/3/1/0/131070718/resuzigi_jajegunosulasut_masar.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/1/0438/7697/4747/files/verb_agreement_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/lasixewelos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/kebotafedidelupena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/49149558930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1371/3569/files/wipe_me_down_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6985/6158/files/6193397805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/67540957433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/kitefefururomizekanawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/jepikite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/bejuginanizeponejalinibi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5909 5408 bytes
SHA-256: ebfa89c0f5ed24e7afe2e75aea4c9accc7e128b350341a4be6c75596e676662d
font_01_sfnt_off00006b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 11332 bytes
SHA-256: 3d3b097f34a63df818ff8dc6512b2f60639a3b5d07659f5615f5c9f5531a490f
font_02_sfnt_off0000908c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 16076 bytes
SHA-256: 52e82f317fd07460633fde2b4a13b2271e088719cba8b5abc0141cb327413dbe
font_03_sfnt_off0000a528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA528 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333