Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34501b365e1f482…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 05:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b9638d1714ebce476f222615eb303b5 SHA-1: b8541e3dcb5eb7965c8c8d3aa4862ecb869c84eb SHA-256: f34501b365e1f482147208281d9c58ad973cf9d32b9a08abf2d51fb9f54cd735
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is further disguised by the document body text mentioning 'Digraph phonics worksheets'. This suggests the document's primary purpose is to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

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=digraph+phonics+worksheets In PDF document text
    • http://kusuzeda.solakiancpa.com/uploads/1/3/0/7/130738531/bozezigekiril.pdfIn PDF document text
    • http://files.windhamchambersingers.com/uploads/1/3/0/7/130775027/8f035b6.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/1/0429/5491/6003/files/causas_del_imperialismo_del_siglo_xix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/41292915775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/17817533308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/bloodstone_of_the_precursor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/77742753428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/rhythm_and_meter_in_poetry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7803/7159/files/49349278535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/kadodufajixatoponibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/roxudoduwifimapilolozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/59267486368.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
🗂 Part of campaign: windhamchambersingers.com 4 samples

Related samples 1

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_off000046e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E4 5104 bytes
SHA-256: 0a470ea9703eef2821a92364ca3948d7cc43b071f1597435872e3557557c734d
font_01_sfnt_off0000584e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584E 10120 bytes
SHA-256: b876c6f2d5280cca0c8951e6c0fd7121cd715b94500da41c7c34dc28f78e67a8
font_02_sfnt_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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