Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8335b41ca33c01d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 07:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf134ddf8e43cc407056f396dcf2b980 SHA-1: b5df5facfe594d0d2fb9de339ea07fe59962c97c SHA-256: f8335b41ca33c01d9da17089afe0c7f3a638370a4fe53b25f166ddc4bbff67c5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting an attempt to disguise the malicious intent as educational material. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector and a link farm suggests a phishing or malware distribution 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=graphing+nonlinear+functions+worksheet In PDF document text
    • http://files.lostangles.com.au/uploads/1/3/2/6/132695629/21ca6d03f.pdfIn PDF document text
    • http://files.marieandcharlie.com/uploads/1/3/1/8/131871614/pazese-jefumuposi-bonibusulage-mukelezenenavu.pdfIn PDF document text
    • http://files.dolphincircle.org/uploads/1/3/1/4/131413550/05123.pdfIn PDF document text
    • http://files.britishjeep.com/uploads/1/3/1/4/131483110/7730540.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0435/2756/9576/files/53940273194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1783/files/fovobonesik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/manalavev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/adjektivdeklination_b1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/phonetic_alphabet_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/zazonuzijar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/40133781684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/82165210162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/android_version_8._1_go_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/wamira.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 4

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_off00005ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC1 3076 bytes
SHA-256: 966795892cbb8e241ae62addc37f4b24fb79412245dcbb63e69ed8842451beea
font_01_sfnt_off00006bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 5464 bytes
SHA-256: 4d5ceec157d4c22e81c8216b0055442142a122001f447f6d3f9e39990fbc96b6
font_02_sfnt_off00007e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 9856 bytes
SHA-256: 9295d1bc7e8ac6e187b840f4a43e59e989372e05212fd35dbb6428991d398a71

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