Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c82cdb5a0351328…

MALICIOUS

PDF

41.8 KB Created: 2020-08-26 05:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3db5064a9a0189e1e3928dd36f5c4439 SHA-1: 61cfde9014ed8d0e72d9c3b7f7353ff510d2a1f0 SHA-256: 6c82cdb5a0351328010f7c73e87dde7c07eb174c3a1df1408f66eee47fc55448
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing campaign. The primary redirector URL is `https://ttraff.com/pify?keyword=kubota+b2150+hst+manual`, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of malicious redirectors and a large number of embedded links strongly suggests a phishing or scam attempt.

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.com/pify?keyword=kubota+b2150+hst+manual In PDF document text
    • http://files.sweetpapercreations.com/uploads/1/3/1/4/131453252/e6c7daba1.pdfIn PDF document text
    • http://files.ericmccarron.com/uploads/1/3/0/8/130874382/3594543.pdfIn PDF document text
    • http://files.sandaharrboerboels.com/uploads/1/3/2/6/132681566/6896535.pdfIn PDF document text
    • http://files.mathbag.com/uploads/1/3/2/7/132710797/nudexakuzugokupipeku.pdfIn PDF document text
    • http://musulevu.ljcollinsauthor.com/uploads/1/3/1/8/131856725/6607415.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7530/1539/files/cascade_control_system_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/gulavenedoletipemigela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4991/7333/files/vutag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/43774421368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/94342826934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/21124238287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/30177440824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8782/1981/files/269375156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/human_anatomy_mckinley_4th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/nitivinulegesagig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/70353766332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5170/0644/files/99998419978.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_off000058ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EF 5104 bytes
SHA-256: a08c63627cbde0e8d235dd6e5b094b829fa6986bd310f4cc9c805e18c7048f6d
font_01_sfnt_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 9896 bytes
SHA-256: db3e2c14425cbc6b0b7b19f2c1031af6e16ec12b07024ce06caf63af66e0bab1
font_02_sfnt_off00008c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71