Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ec81f3b62cd394…

MALICIOUS

PDF

48.2 KB Created: 2020-08-04 01:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 597191b257a43bb77ddae17d2ce7fd36 SHA-1: 54cc8518a493de30a5316279b8eb88a18b33fe14 SHA-256: c6ec81f3b62cd3942012aaff21d0806a743f634a9fe0d163d6c3d85738f14ab8
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.ru/pify?keyword=how+to+cite+pdf+found+online, is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to citing PDFs online, likely a lure to encourage clicks on the embedded malicious links.

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=how+to+cite+pdf+found+online In PDF document text
    • http://files.fancycanary.com/uploads/1/3/1/4/131438453/6224309.pdfIn PDF document text
    • http://files.michellejestermain.com/uploads/1/3/2/7/132740905/4a69c9dce41.pdfIn PDF document text
    • http://files.thefreemath.org/uploads/1/3/1/3/131383838/vadexikagur-bosivokev-xedexejakozuze-vuvadaximuleriw.pdfIn PDF document text
    • http://files.apragp.org/uploads/1/3/0/8/130814200/miruxiwezobig-mufigor.pdfIn PDF document text
    • http://files.skinnatiouslbb.com/uploads/1/3/1/0/131070674/df5593372dcbc3f.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/1/0427/8507/9452/files/53700655759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/4127222145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/digep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/70153064662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/88738637870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/43986648409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/sagozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/21347351204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/zesubosanarabixixijelebav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/66740214518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/81607283184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/unordered_list_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/tuvalokepevoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/37449048767.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED7 4720 bytes
SHA-256: a66f3496752dd0b67099223fd4aa6c28ff3a1f53b20cbbdca3461638fb37fed8
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 10848 bytes
SHA-256: 1eca950113176cc01786501bbba3c51221fdc91e7baba66d81d96065dd8ecf2f