Malicious PDF — malware analysis report

Static analysis result for SHA-256 a615e6d402f1a4ea…

MALICIOUS

PDF

53.0 KB Created: 2020-08-19 02:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8327343aecd7d743c7f72a376ac037f SHA-1: 9e6f46187235f82554deb64b62dfb539a4e642d3 SHA-256: a615e6d402f1a4eab3a50b817bf9ebabeb080984d57e993c0bc54a6228309422
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains strings that appear to be related to an 'employee daily attendance sheet', suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to host or chain to further malicious content.

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=employee+daily+attendance+sheet+xls In PDF document text
    • http://files.adornationforlife.com/uploads/1/3/1/4/131407761/1449655.pdfIn PDF document text
    • http://fimikol.odoriworld.com/uploads/1/3/1/0/131070476/welamefejup_sosukukabuwe_votesazu.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/1/0428/4504/4892/files/amelia_bedelia_means_business_book_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3812/1895/files/gubitaxigadizesomuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/different_types_of_air_pollution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budexojimomamuzarumedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/16456581176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/xixenimekivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6553/5638/files/libro_el_fenomeno_tumoral_dr_isaac_goiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/13406601152.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 5344 bytes
SHA-256: 31a659c70efa6ff6f49d015120f75fa1aa6863a830048871e8b3d2dba775fef2
font_01_sfnt_off000087a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 1596 bytes
SHA-256: c198a591ae584e5ce0ba4e9356ad643509fbd09026bb86d1b1e1e191a79662f1
font_02_sfnt_off00008fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC6 9924 bytes
SHA-256: 042fb2a6aa4b308991c6125a3e2753e0bb9193054097b66ef27ae2420f8d2aab
font_03_sfnt_off0000b1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EB 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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