Malicious PDF — malware analysis report

Static analysis result for SHA-256 377afddc9bd288e6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-10 09:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 423707da8b5d4139186bf3140a412de3 SHA-1: 9c58c31768a0e166d79e1817972d00b63a6ea5fa SHA-256: 377afddc9bd288e6b0a00ce7c678ac8529d30a24e68f642db358d4557efb51ea
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=macrocytic+anemia+pdf' which is likely used to direct users to malicious content. The presence of numerous other PDF links suggests a link farm or a broad distribution attempt, characteristic of phishing or scam campaigns.

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.ru/pify?keyword=macrocytic+anemia+pdf In PDF document text
    • http://files.nigerianwriters.info/uploads/1/3/0/7/130775011/tonasov.pdfIn PDF document text
    • http://kipotazo.fredoniapubliclibrary.com/uploads/1/3/1/3/131380213/7144526.pdfIn PDF document text
    • http://babagokug.jamiejirout.com/uploads/1/3/2/6/132695569/639ca058aa.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/1/0438/1615/7344/files/pptidos_y_enlace_peptdico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/najajiwelatikixiravanitob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/kexosakapejelomitixase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/7._1._5_patch_notes_class_changes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/lalalitiviwutugepufeleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/29764167727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/79183481914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/artikel_tentang_bahaya_narkoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/baramati_taluka_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/24041507374.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_off00005f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5200 bytes
SHA-256: 8932a67879658730d3c95f556a39225e7487bed29eedba7577313c2148c87c0c
font_01_sfnt_off000070d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D7 10092 bytes
SHA-256: 4a127aa439a77bfc9ce8be6ec0f06285ed3752249ea3e694691ff9a98ad9270f

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