Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffa2e12e2eb410e…

MALICIOUS

PDF

38.9 KB Created: 2020-08-18 18:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f57c2db5090bab0fba665feca55c97b SHA-1: 6fba5a181cf6832e0051adb1d62fcada6bad5ac4 SHA-256: 4ffa2e12e2eb410e775513f052d6312d87167fa7afc31c7ebec6ddfd8d2d90c6
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that includes 'boom beach mod apk terbaru 2019'. This suggests a lure to download a modified application. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify, likely for SEO manipulation to increase visibility of 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.cc/pify?keyword=boom+beach+mod+apk+terbaru+2019 In PDF document text
    • http://files.inbalancetherapyclinic.com.au/uploads/1/3/0/8/130874050/sawejebawitu_mojixefo_vifanasubumid_xufowebifew.pdfIn PDF document text
    • http://files.dkgalaska.org/uploads/1/3/1/3/131383648/wefokagen.pdfIn PDF document text
    • http://files.philartistscollective.org/uploads/1/3/0/7/130775393/pumoje.pdfIn PDF document text
    • http://gaposi.myjazztrumpet.com/uploads/1/3/0/8/130814328/kebavoxiburadita.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/1/0427/6230/5702/files/daginijujatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/32881671379.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/3310/2245/files/xemoxusonubipipafosumoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/piketider.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/ase_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/legasuvil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/last_of_us_theme_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/62084374664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/cracker_barrel_puzzle.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5871 5836 bytes
SHA-256: 8dd0d32ba92e6d03365ee430e83d042c6bcb870747fb468e8d68348ad45fd1b0
font_01_sfnt_off00006c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 10112 bytes
SHA-256: 91b88026f429ce668410f2a0aaa9e4fbe550cd0f0dbb1ca25bb8d6cfbd00e04c

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