Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbb084bbfef8b33…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 12:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae41830443fd133027438714ffa0b2ca SHA-1: 3dce19dd64bf770a549cf96607f0f84e735409d4 SHA-256: ddbb084bbfef8b337ecbed78b98aa5562cca37e2bbf0b817c728847007501762
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ejercicios+con+numeros+romanos+pdf', which is also flagged as malicious. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning attempt to distribute 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=ejercicios+con+numeros+romanos+pdf In PDF document text
    • http://files.ccfsealytestsite.com/uploads/1/3/1/6/131637168/xilek_dudovuwow_palifalatug.pdfIn PDF document text
    • http://files.endoflifedoula.co/uploads/1/3/1/4/131452840/mumovik-puzolitirofex-kowokewelidi.pdfIn PDF document text
    • http://files.darryljarvis.com/uploads/1/3/2/7/132740264/9102558.pdfIn PDF document text
    • http://files.peggythomaswrites.com/uploads/1/3/1/4/131438313/xuzopatotobal.pdfIn PDF document text
    • http://files.fastinfofinder.com/uploads/1/3/1/4/131454523/5831411.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/1/0427/8275/2935/files/bowipudodabavelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1174/3639/files/viscous_fluid_flow_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1483/8679/files/bajawujavigigufile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/aadhar_card_update_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/color_street_application_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/38519137810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/city_of_eugene_athletics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/49107376181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/nawunotepixaniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/lomumisimuzidelepalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/juguzujuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/free_missouri_residential_lease_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/benugumadutapudubiduzo.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_off0000693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 5300 bytes
SHA-256: 52f674e806ef5fcaa98aa76550418c1ce36d90ec2659768bb903586a62b7075d
font_01_sfnt_off00007b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 14516 bytes
SHA-256: 913ec012851f7d77e0a8317df57ab5a20784951d9f1fb9d7ca322c3a27e0b52f
font_02_sfnt_off0000a7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DF 16164 bytes
SHA-256: 726e433c7bbdf2a5a395708565affa97fb04a35428008954b5256cf6adea57e8