Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca54d670236c0a48…

MALICIOUS

PDF

47.9 KB Created: 2020-08-05 12:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d612e091f83ae9a010107e1cd948f75f SHA-1: 0255660ea5ded1e25585b0a98bf731908c5a2f64 SHA-256: ca54d670236c0a488580e8456fda2eb80f73368f9440a44888933e5d2a9b8070
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an announcement memo. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to a malicious site.

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=announcement+memo+sample+pdf In PDF document text
    • http://files.marinchorus.org/uploads/1/3/1/3/131383664/lokaxafusanobo-buzemafiza-razuxufi-baremefakot.pdfIn PDF document text
    • http://files.howardcountytaxicab.com/uploads/1/3/0/8/130813095/a81740.pdfIn PDF document text
    • http://files.yogadiversityinitiative.org/uploads/1/3/2/7/132712282/mivilawowe.pdfIn PDF document text
    • http://guxodoje.wyatthersey.com/uploads/1/3/0/7/130776208/4165522.pdfIn PDF document text
    • http://files.wvswma.org/uploads/1/3/1/4/131453945/kitumukinuzawulide.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/1/0431/7390/4545/files/22263188366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/papowajobipafotaxirufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/40487041578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/open_file_in_browser_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/marathi_bhakti_geet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/gagogozasetogifuvaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/negonekakiwexufixemam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/81398694229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/97577403241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/40271384351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/occupational_exposure_band.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 8

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_off00007dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 5196 bytes
SHA-256: f91beb3edb00bade1bd52a0214c421d97d81ffeeeb20cf6ab150d334193eed96
font_01_sfnt_off00008f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9F 10092 bytes
SHA-256: 7c9557388448e3bd394a2de03110f8c818edd9462faaca5e4ad59fb5798615eb

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