Malicious PDF — malware analysis report

Static analysis result for SHA-256 b871acd4158bc9e6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 22:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b02c9f5d6e0ddfe0849b7c5b32110e9 SHA-1: 65a9367c287b9fb81a05329bf01adebbf11717f1 SHA-256: b871acd4158bc9e6e796b69ee3b68a1a1d5aa01704e728e158e6b986dcfffe78
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=skytrain+map+bangkok'. This suggests the document is designed to redirect users to malicious sites under the guise of providing information. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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.cc/pify?keyword=skytrain+map+bangkok In PDF document text
    • http://bobowexe.inspiredemocracy.org/uploads/1/3/0/8/130873947/2455716.pdfIn PDF document text
    • http://files.ashlkwon.com/uploads/1/3/1/0/131070294/demodi_xoxakerademi_jesurabazafowig_golalijotog.pdfIn PDF document text
    • http://files.myheart-myhome.com/uploads/1/3/1/3/131383398/2349459.pdfIn PDF document text
    • http://files.divasdesignsri.com/uploads/1/3/0/7/130776775/kisujolevomad-rarofamaga-savotod.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/1/0429/5272/0543/files/bapikojipivav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/oceanofpdf_website_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/administrative_law_in_south_africa_cora_hoexter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5848/3620/files/graves_jgl_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/pedugazibomomiligosuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7437/files/two_digit_addition_without_regrouping_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/noride.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/alto_s_lament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/22704398607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/64554568851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0317/4308/files/portfolio_website_wordpress_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/adonis_golden_ratio_training_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/nufojaxiwadujipejigowim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/bamthathile_amapiano_remix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 5340 bytes
SHA-256: 1423a76cbca19e47a37adb959dacb17fe94cfdcd94d43f87ef5256b60e06e7cf
font_01_sfnt_off00007a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A85 10128 bytes
SHA-256: 4b27e838fbfb1cc46449f407eda600b9a7fd4703b2ea47715d93da8b5da8b9a7