Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd11371d28ed638b…

MALICIOUS

PDF

55.9 KB Created: 2020-10-27 22:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 21924ead1f7f181ff95e198dc8eeeabd SHA-1: 9fd882c9351d33d6fc7f7d9ecc2d594ca260f42c SHA-256: dd11371d28ed638ba0403b3b9204bf748ca712a2a53cd2f886e4b1553ef58183
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.me/123?keyword=draculaura+doll+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8cf198b17bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f93013508678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8e36d873867.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000072eb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000072eb.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000c38b.bin)
    • https://s3.amazonaws.com/fizup/basic_spoken_english_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/96001344345.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/argala_stotram_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/bonafide_certificate_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0507/8434/files/erie_county_pistol_permit_wait_time_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3188/6998/files/mitsuru_gift_persona_3_fes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6076/1254/files/buboke.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/84855411737.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/basic_accounting_journal_entries.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nigefem.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/3534001867.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/tipelejajigowagalevewe.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/8846404638.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/71048463071.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/list_of_accusative_verbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0892/0222/files/mewumik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0094/5564/files/ingurgitacin_yugular_fisiopatologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1155/3473/files/xuloja.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 extracted file (font_00_sfnt_off000072eb.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000ae59.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000ae59.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EB 4608 bytes
SHA-256: a5557260837cb283e9fe235d0330e0f12860a74e541e2009ac7084838827fadd
font_01_sfnt_off0000829c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829C 13056 bytes
SHA-256: 4fe02a883314e643689aa54d52b8e62d7877d7f80cb21803b0cf8c9154941cb0
font_02_sfnt_off0000ae59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE59 16204 bytes
SHA-256: a109d5cc1a8599929bd7702a943337bd153faf2776ff4e30ac39a15e38c17cef
font_03_sfnt_off0000c38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e