Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e8c5745817f079…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 17:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4da858664c78e9a7ef24116adb500219 SHA-1: 4444ea67ed1ffbf6e856bdd1418c38bd6650b937 SHA-256: d5e8c5745817f079041efb0e622122d067f5d2cb9d13e539059b6b4366c05813
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to direct users to malicious sites or manipulate search results. The primary malicious IOC is the redirector URL.

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=we+are+all+cannibals+pdf In PDF document text
    • http://files.tagmasters.us/uploads/1/3/0/7/130738752/rilopujumerovizilova.pdfIn PDF document text
    • http://files.walleysbookreviews.com/uploads/1/3/0/7/130740551/topumogiv-lafimedoburaz.pdfIn PDF document text
    • http://jakutazij.sanctuaryatwoodville.org/uploads/1/3/2/7/132710592/9920b.pdfIn PDF document text
    • http://sagiwix.concretecontractoromaha.com/uploads/1/3/0/9/130969723/9598754.pdfIn PDF document text
    • http://wesuzis.archaeomonth.com/uploads/1/3/0/8/130814017/wipevexuwivakil.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/1/0428/2833/3219/files/19989875991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/command_block_enchanting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/albert_camus_the_fall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/barron_s_600_essential_words_for_the_toeic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/60874488845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/toresikakafedutura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/miragifus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/3223535353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/centrifugal_pump_curves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/bavabibifazajedofoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8111/2483/files/follow_a_player_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/discrete_fourier_analysis_and_wavelets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/fusionner_deux_en_une_seule_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/varovalofudujuvetediwi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 5300 bytes
SHA-256: 66cc49c59f38d08bba7c78703e7d11ae811689c9271c8cb267000270502d0a3c
font_01_sfnt_off00007af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 10556 bytes
SHA-256: fa76503a3338c2c7e0c4ab82bf02703d5e7d8f063b863fa0b53cbfb42b6bb3e7