Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c4ecffee7d05d7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 11:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 800258866c86381ef0812a6383d61487 SHA-1: fcf12299282b4637af1a304393eb22c70a81c46b SHA-256: 67c4ecffee7d05d75fcb0e4a86fd2a9d7d3e3f6d41cb78a19260fe1023b3d45a
194 Risk Score

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=usa+today+crossword+answers+yesterday In PDF document text
    • http://files.asiehart.com/uploads/1/3/2/6/132682441/niruxekejulalapo.pdfIn PDF document text
    • http://files.splashdogwashing.com/uploads/1/3/1/4/131407369/faloxutisekofupus.pdfIn PDF document text
    • http://files.daughtersofthemayflower.com/uploads/1/3/0/7/130740521/xawekepogopi.pdfIn PDF document text
    • http://files.biorbnz.co.nz/uploads/1/3/1/4/131407572/1089498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/suzilasatekotigubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/iq_option_binary_trading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/tabasarovopodi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/algebraic_identities_class_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/69517029071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/xaximoseb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/citizen_eco_drive_gn-_4w-_s_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/35159895827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7185/8838/files/oster_bread_maker_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8457/7958/files/neurosis_and_psychosis_freud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/86443655803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4769/2957/files/zupol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 4828 bytes
SHA-256: 067837309d1978dd1870185c3b362044acefb312461c1f78a8efcf2f4346f9e3
font_01_sfnt_off000071e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 9980 bytes
SHA-256: 3bf7b512402c4fd506f477244e11d1ed76abb4138019db680e0d389c3d093270
font_02_sfnt_off0000940e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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