Malicious PDF — malware analysis report

Static analysis result for SHA-256 31be8de2fff99fcd…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 14:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40e6e71a9070d42f330e20af2a0013c1 SHA-1: e64b382dd96512a408cb957033977b7cec134555 SHA-256: 31be8de2fff99fcdc9c56948342335cfd673c8de7b5a1b85c450a878ec49c0d5
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text referencing "Scratch 2 offline editor 2.0" and a URL that appears to be a lure. The primary malicious IOC is the redirector URL which likely leads to further 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=scratch+2+offline+editor+2.+0 In PDF document text
    • http://kulomorap.michaelbraunlin.com/uploads/1/3/0/8/130874431/8aaf3683.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/1/0428/4504/4892/files/allianz_travel_claim_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/39298093283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/shakespeare_beaucoup_de_bruit_pour_rien.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/primary_keys_access.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/lipukufibategukazunop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/vorobowuvonajixaxorovix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/argumentao_redao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/58100483954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/60523251449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/50876245913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/remikozibugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/system_analysis_and_design_notes_for_mba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/78305727276.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 5340 bytes
SHA-256: 88ce1eb3454f0ea5e7e48cf51e4adff45782bb0ea21f2c0cc78e7576f1cd9c77
font_01_sfnt_off00007471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 10852 bytes
SHA-256: aa06bc37430a03901fc9074c911fca3eae043559cab8c4431ec97db7d72cf5db
font_02_sfnt_off000098ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EE 16144 bytes
SHA-256: dd9a388fcb144a6ba51f93f71b1b5f80273f5f386ed315a2c4249d443452b30b

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