Malicious PDF — malware analysis report

Static analysis result for SHA-256 a986e6b847b0b4fd…

MALICIOUS

PDF

35.2 KB Created: 2020-10-31 14:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 72ccb713c955d8814641a10703ebb61b SHA-1: a8235a0197574b97b3b8e0da86751bc52cd3b05c SHA-256: a986e6b847b0b4fd3ce7e7008eb565f43eff391112b57ae4c9456d3f7bae2de7
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?keyword=managing+engineering+and+technology+solution+manual+pdf In PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/3afa756b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/modern_family_cancelled_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/ae_housman_poems_into_my_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/xezexapozodawewekim.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/tepaxibumufidovaxepated.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fodifok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0647/4419/files/sodezeno.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/51003558757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8127/5832/files/ways_of_reading_10th_edition_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/71803753568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3406/2231/files/vevawofedepezakovurilaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/53208634518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1057a9-1104-4873-a225-8d3b72d58a3f/wubetulotozef.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_off00004914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4914 5676 bytes
SHA-256: 3a47399aadf456df2c221ec0eb23e7782bed736221b4288cc7af9ca976d17acc
font_01_sfnt_off00005c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C50 10688 bytes
SHA-256: 0678714688028c24be717634722dfeec8597f54f48bf17064a674b4138857fe8

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