Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cdc2c032f2d779…

MALICIOUS

PDF

45.9 KB Created: 2020-08-10 21:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88fd3c3d2ac889d28dc9913600aa1342 SHA-1: 7469819e76e8166999b2bb1b736f755f7ab4625c SHA-256: 30cdc2c032f2d779c87b05b0b5048e0376f69376bc173d1a925a201abccc84ce
194 Risk Score

Malware Insights

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

The PDF file contains a lure related to '10th class english book answers pdf' and embeds numerous links. One of these links, https://ttraff.ru/pify?keyword=10th+class+english+book+answers+pdf, is identified as a malicious redirector. The file also contains a large number of SEO-optimized PDF links, many pointing to cdn.shopify.com, suggesting a link farm strategy 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=10th+class+english+book+answers+pdf In PDF document text
    • http://files.theschoolhouseeclc.com/uploads/1/3/0/8/130813317/7581302.pdfIn PDF document text
    • http://kadopunur.northernumpires.com/uploads/1/3/2/6/132695615/8419957.pdfIn PDF document text
    • http://files.thoughtfullyshelby.com/uploads/1/3/2/6/132681456/7128611.pdfIn PDF document text
    • http://files.brunswickbands.org/uploads/1/3/1/3/131380308/wimamuvofajit_sedasik_tufopakuti_kalafojugazeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/barefota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/zuxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/66225896583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/kapubovafapisino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/wasimebijadox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/marketing_project_report_on_sales_promotion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/83101805763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/82051954231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/fofufebiduxamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/asfixia_perinatal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/13210863745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/bank_exam_preparation_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/menanebumapodigurakas.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_off00006028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 5812 bytes
SHA-256: 881f53f6221f33d9f6692b13e563c7c7c83439b793bd2e706ebd111f67571dfc
font_01_sfnt_off000073ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 10180 bytes
SHA-256: dba2df17f775ec4228bc512dd6c11c9a78243403b22757bd5078f4b11f0e8d7f
font_02_sfnt_off000096dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96DC 5424 bytes
SHA-256: df4542a37b5fbad568d94063c0ef1b29d0adefcc4b7bf1b24886ea2487c84900