Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac53e92a74e144e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-05 03:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a11917928ad1b1c45e3309868aae2eb3 SHA-1: d928b7fecf2a11c0b729f1901ca3a3320708a7df SHA-256: aac53e92a74e144ef00be5cd08d5100ec880aba1bb91a9680a6ea0525db3d61e
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. This URL is presented within the document body, disguised as a UPC barcode generator. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates 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.ru/pify?keyword=upc+barcode+generator+pdf In PDF document text
    • http://files.susanstollphotography.com/uploads/1/3/2/6/132680955/2864807.pdfIn PDF document text
    • http://files.grahnforlang.com/uploads/1/3/1/0/131069992/69da357.pdfIn PDF document text
    • http://files.psycholoog-gooi.net/uploads/1/3/0/7/130738719/suwerulotopu.pdfIn PDF document text
    • http://files.top500albumreviews.com/uploads/1/3/0/7/130738562/3984093.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/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5277/7128/files/92767063768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/72949456021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/27251215331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/manidweepa_varnana_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/ribizupekizoxepibukemup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/damodaran_on_valuation_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/86549374165.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 2

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_off00005c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5244 bytes
SHA-256: 066059e34d8a246166d3e221273b41829c3b40daff858de9cc548677fab5fe3c
font_01_sfnt_off00006e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E68 10004 bytes
SHA-256: ffffd529792f6bd3824a8a3c73fe29a3164f0f56b5918240463e7a55e249d6e4

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