Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a5a80089700f4f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-10 17:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d0b7db4ea9075bec21949bb39de6820 SHA-1: 567caad93237657454fd7c99507657d2a18262c3 SHA-256: 73a5a80089700f4f18c667ccd9e11c01b7c27479f481d9e7edbe5301827496ec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing attempt. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, contains references to a 'San francisco cable car map pdf' and the malicious redirector URL, indicating a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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=san+francisco+cable+car+map+pdf In PDF document text
    • http://files.pathuberartwork.com/uploads/1/3/1/0/131070733/1992815.pdfIn PDF document text
    • http://files.mdt-agilityability.com/uploads/1/3/1/3/131379894/kiseg.pdfIn PDF document text
    • http://files.sutherlandbeatson.com/uploads/1/3/1/3/131384024/ef3a198fc3591df.pdfIn PDF document text
    • http://files.alden43dressblue.com/uploads/1/3/2/7/132712034/413199.pdfIn PDF document text
    • http://files.oakcreekfootball.com/uploads/1/3/0/8/130814390/lasajizojuk.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/1/0430/3588/5725/files/77000466052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/zuvatokexojimexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/puvaridosipazofora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/mofesalejiwezemazawira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/goxuwavapenunopam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/annealing_normalizing_quenching_and_tempering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/1779259654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/reactor_idle_save_editor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/easy_alto_sax_sheet_music.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_off000066c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C5 5544 bytes
SHA-256: 79863f55d734bc164c41ee017eecceaded64424ba6ad8e40047abc0aee73c6a8
font_01_sfnt_off00007977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 10412 bytes
SHA-256: c9b4acbcfdfc2a85e05c4e0684335604016fd72c130d6fec3c70cb6d4e38ebc7

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