Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58dcbbbad149cc2…

MALICIOUS

PDF

34.2 KB Created: 2020-08-11 18:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aad5dd0c2b92b8b0de08fdef55d25823 SHA-1: 712bf01cab128eb3fcb1f5ccfa4ef847d6e068b9 SHA-256: c58dcbbbad149cc26001c63af3bc0fc8311a593f4855453fa8182295470d9b20
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of external links, many pointing to a redirector service. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'here i am to worship chords in c pdf' and the wkhtmltopdf application, suggesting a lure document. The primary malicious IOC is the redirector URL, which likely leads to a further stage of infection.

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=here+i+am+to+worship+chords+in+c+pdf In PDF document text
    • http://fetapudil.hogridin.com/uploads/1/3/2/3/132303382/pipugavudagotu_bumedinoguj_jinoliwiwusi.pdfIn PDF document text
    • http://files.gcfishandgame.com/uploads/1/3/0/8/130813846/de9233545d77a.pdfIn PDF document text
    • http://files.daviddukart.com/uploads/1/3/1/4/131483097/e9ce6c5994.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/1/0428/9835/8432/files/16175378270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/sufiwegulexogub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/zewesobogolifobafuduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0381/1739/files/xitigijadotagegirijudub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/decrease_size_acrobat_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/zomikadofofizikazutekas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6942/1206/files/arcanos_maiores_do_tarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/alloplastyka_stawu_biodrowego_pozowski.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/darepibuso.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 2

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_off00004308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4308 5416 bytes
SHA-256: b2e8ac6edf3a21ea497b97770aab0af5deae52b8d86e37cd13f0791fa0a4ee77
font_01_sfnt_off0000555e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555E 12408 bytes
SHA-256: 20bb8d769e846be42f29fc2de60d556ad76be6a21f6ef5f819467b53b1d38a0d

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