Malicious PDF — malware analysis report

Static analysis result for SHA-256 8595cf9fb73ad171…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 09:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47a4e30f1cf4c4e5eb8719dfb90b0265 SHA-1: cddcab5185e6650b3399ed2ec0b37cc32a6a2635 SHA-256: 8595cf9fb73ad171217bdaff6baab69a14a84326dd836986f7db8dd90f65bb3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to malicious infrastructure, disguised as an NFL schedule. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document is designed to lead users to harmful content. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are part of the malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=nfl+schedule+week+3+pdf
    • http://files.beritgehrke.com/uploads/1/3/0/7/130775393/a2f309.pdf
    • http://files.romainewashington.com/uploads/1/3/1/8/131857193/ropodefi.pdf
    • http://files.homespirit.shop/uploads/1/3/1/4/131482916/puwulomu.pdf
    • http://files.thomasemyers.com/uploads/1/3/0/7/130738971/2007eea75dbbe9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/75596714460.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/gogamepurosopujeni.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/jipisojamamuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/saxexof.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/voltage_regulation_of_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/33308879973.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/buvit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/business_model_generation_wiley.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/43905326720.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/diccionario_de_teologia_biblica_bauer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/28675978913.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c0.bin
9dd17b67a3dc7b7b6c02350391a3bad12956c1a071ed3be319680a5d22960740
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5228 bytes
font_01_sfnt_off000074a1.bin
6229c6f37df761cb37aee98b91e7ec57b28297794bf86349d3011af919b174eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 14200 bytes