Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad811d5f9e3e56b5…

MALICIOUS

PDF

45.8 KB Created: 2020-08-10 00:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 686f5ff06bb4e8f7f6c722cbfbfb5def SHA-1: fd8a7ba2bc4578d903c7432e64e74c5a8a194fd7 SHA-256: ad811d5f9e3e56b5229a4691927a57c74ebb2e8ae3048376869059942674df42
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF manipulation and includes the malicious URL. This suggests a social engineering attempt to trick the user into clicking the link, likely leading to malware download or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=reduce+pdf+dpi+mac In PDF document text
    • http://fetan.nataliebritecoaching.com/uploads/1/3/1/3/131383657/0eff211a9d99786.pdfIn PDF document text
    • http://files.pediatricspeechthpy.com/uploads/1/3/1/1/131163718/jovogavemusezowilune.pdfIn PDF document text
    • http://files.twopsinapodohio.com/uploads/1/3/1/0/131070993/wikiparuzomareg.pdfIn PDF document text
    • http://files.hidayatashila.com/uploads/1/3/1/3/131379085/4780627.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/1/0433/9073/0405/files/natewelujipokopulinin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/ipad_air_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/punctuation_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/pdf_split_and_merge_software_free_download_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/34200564089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/relieving_letter_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/13889428730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1825/9365/files/enter_the_gungeon_megahand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/gipexuxodijutena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/banking_regulation_act_1949_bare_act_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/21469923818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/zanisomam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 4588 bytes
SHA-256: 1e1d756a9c865d7f72f29c357e2b3933209578b0169a66f4f247af070612371c
font_01_sfnt_off000078d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 10468 bytes
SHA-256: 51f13f71ca79d0cd960bd5c41b5d724fc9a2ae4a941362bc5d0812313c34b303
font_02_sfnt_off00009c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333