Malicious PDF — malware analysis report

Static analysis result for SHA-256 d911a88307e336d0…

MALICIOUS

PDF

36.4 KB Created: 2020-10-01 23:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edd79ac898e4a7117047af97e6bd4e46 SHA-1: e91869be250b39992e7b1a55ce0c1a8dbf4ae93b SHA-256: d911a88307e336d0ce55a55b781fa73467246bb1e7387336570b38eb70c20a51
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://gettraff.ru/strik?keyword=galaxy+saturn+base+station In PDF document text
    • http://files.chaddertonheritage.co.uk/uploads/1/3/1/4/131407695/venozopasaja_peripukaxiker_vamezefume.pdfIn PDF document text
    • http://files.mikeclark.com/uploads/1/3/1/3/131398559/6dce8656f4bf3.pdfIn PDF document text
    • http://litijo.formahoganygirls.com/uploads/1/3/2/7/132740280/4732845.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/51127091965.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/1/0431/5539/0630/files/18733729840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8060/8669/files/53979171523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9835/3048/files/bw_dm6_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6646/9799/files/entrar_en_facebook_con_otra_cuenta_diferente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1145/9237/files/linear_relationships_tables.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_off000043d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43D1 4904 bytes
SHA-256: e4effd68509e407eafd5e6559c0ef65cc8360655cd0fe2eed9c072eb6af602a9
font_01_sfnt_off00005498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5498 10136 bytes
SHA-256: d325394ee9e14624a68cc121de42b1e54cba013b4b401816567a379cd60fb379
font_02_sfnt_off00007759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378