Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80da7cf6d41c314…

MALICIOUS

PDF

51.2 KB Created: 2020-09-13 20:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f435e9e26a458b5d05c8e97294e6150 SHA-1: 8b643caa49aa8ed2cf62af71a9e59bca19b873e7 SHA-256: b80da7cf6d41c314d45339d5ed7444edc91f1de972d9a44b95f2c63b65f67082
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/wix?keyword=tell+city+furniture+dining+table In PDF document text
    • http://files.biancaceriophotography.com/uploads/1/3/0/7/130775171/671141.pdfIn PDF document text
    • http://files.livestockmanagementsystems.co.uk/uploads/1/3/1/3/131384256/tazemexabizexu.pdfIn PDF document text
    • http://bebef.therawcliffeschools.co.uk/uploads/1/3/1/1/131164394/4275581.pdfIn PDF document text
    • http://najaz.romuluseducation.com/uploads/1/3/0/7/130739017/4909141.pdfIn PDF document text
    • http://files.staroftheday.org/uploads/1/3/0/9/130969818/6564ed41595.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/1/0435/5037/6099/files/causas_del_fracaso_escolar_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/62003349272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/36536404555.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e1f893424f6f45a6bf6d60411436a869.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ba2c19_b06e52139ece4465821d70f266f6f2ad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/dumezagezedenize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/leripokulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1101/2770/files/how_to_calibrate_pressure_transmitter_with_hart_communicator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/717242599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/diccionario_de_filosofia_nicola_abbagnano.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_off00007bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEC 4972 bytes
SHA-256: 2c3e51ac64158ad17d0d6ea78d3f5079212f98625009e079492595a33d21e90d
font_01_sfnt_off00008cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDB 10872 bytes
SHA-256: 7765b86ad0d601e59b6b789be1394f2d6a187421ab587d0a455a82454d12731a
font_02_sfnt_off0000b1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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