Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb141aa6a55a526b…

MALICIOUS

PDF

238.0 KB Created: 2020-08-08 15:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76c60426fcb1f5336e7aa054e32d845d SHA-1: 6e2a803d657aa990ca0b81ada85e2fa3893f2157 SHA-256: eb141aa6a55a526b4cf58916aae1db3c0d3cadaa70231e8ad5e455e9af72deb2
174 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.ru/pify?keyword=behavioral+biases+in+investment+decision+making+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary mechanism for luring the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=behavioral+biases+in+investment+decision+making+pdf In PDF document text
    • http://files.sproutsmyanmar.com/uploads/1/3/2/3/132302863/giburapudiga-dojowul.pdfIn PDF document text
    • http://files.secondsundayride.org/uploads/1/3/0/7/130775979/mokole-pagop.pdfIn PDF document text
    • http://files.blmslibrary.org/uploads/1/3/1/6/131606644/ebdfe5.pdfIn PDF document text
    • http://files.harestanesglassstudio.com/uploads/1/3/0/9/130969558/mesakilijejabikulu.pdfIn PDF document text
    • http://files.independenceconcretecontractors.com/uploads/1/3/1/8/131871938/3660508.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/1/0434/9827/4978/files/12107878127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/farolibulezumizopop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/free_printable_math_worksheets_for_1st_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3913/5643/files/60631100254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3442/files/tivoxizawiwumotiribawoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/vavojojotegox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/18767679586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6038/8259/files/sugigadorak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/rapeguf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/30958801130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D7D 5884 bytes
SHA-256: 579a81b9e3dba0f35d96ac7de56ff9a51bfb7f49193a6c08e22bde0e0386480a
font_01_sfnt_off00036161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36161 16008 bytes
SHA-256: 072d2e29066b779d35fa654b98483f2124e7f15dcfe1f9399f769d202c9b0629
font_02_sfnt_off000393c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x393C9 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648