Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa30d89299a423a…

MALICIOUS

PDF

37.2 KB Created: 2020-10-26 03:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: da4c70ae0ea8e4feb14a353aad7cdd93 SHA-1: a026a881bc8ef30e4cc289b8f667b1c5e481f082 SHA-256: faa30d89299a423aa646f0ff590e4a105f0c66720a1560dc40b82e22aa4e51ee
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.link/123?keyword=descriptive+text+animal+worksheet In PDF document text
    • https://masagepa.weebly.com/uploads/1/3/4/0/134096256/8900759.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/2945883.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/adb07038f.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/4287622.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/2500895.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/kezonezabam.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/dudejelutoxoweterif.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000052b9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000052b9.bin)
    • https://cdn.shopify.com/s/files/1/0484/2045/4554/files/darabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/makategofifuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7580/6402/files/83467271878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6294/6720/files/uc_mini_apk_android_2.3.6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7168/5027/files/71088067637.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/63241639292.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/ordinal_numbers_worksheet_esl_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/tevutasurexa.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/6633321745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae4c3aa-e4db-4fda-89ae-11ca5ce27150/81849021655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc807825-6b94-470c-bf4c-fc2f2b4b4a88/ryobi_miter_saw_manuals.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/dokijiwulubisejowope.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/vugig.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/personal_computer_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/19588188863.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/71536513508.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_off000052b9.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B9 5456 bytes
SHA-256: 4827b040ff2c4cdb9bb38e0de84d767a71b161978b5f05e003f5c7319b0daa4a
font_01_sfnt_off00006530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 10028 bytes
SHA-256: c9ecd12c0c854414b9adea0af56cdd4a834a9a0c578b27d9614ad6ba0f3c4053