Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b7b5254323379c…

MALICIOUS

PDF

43.5 KB Created: 2020-09-11 03:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b0917d7ad259cd43b3eff4a155f71881 SHA-1: 3183e7ab3b4313c9f80ca961f4471bce1f635664 SHA-256: 14b7b5254323379cbf4c2caf0eb2df0c74ec09ea424c016abdb7286aa2078233
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.ru/wix?keyword=butterfly+song+come+my+lady+free In PDF document text
    • http://wubiv.alexandriatalley.com/uploads/1/3/0/7/130775565/tejexexetanonot_lomudi_lobokojoxo_vatexiwes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/4fb05f_51b12fb6aaa642a7b8a3098da94ed96b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/32acb1_89a5f1236e47410399841b90931a0a80.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1615c_e5280c418a354197bda2c049b231cf75.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87fdc7_bd0ca00efe774248bab860ed26d81f37.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dd040_ecbc1f9cb6264e23a07efc93ab32a6d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6924eb_8d5b8eef2a394972b05e1a5ae0e3a83e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f68081_615c56eb238b48cb9e968a4132fe2619.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ad2ade_b55468aa5daf451192c9828130773bb8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2744/5413/files/9290717410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2765/9932/files/neoliberalismo_y_capitalismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2654/5820/files/sample_nih_biosketch_new_format.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_off0000677e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5492 bytes
SHA-256: 1dc54b57204aa711f3b86c9a1e977f6114552e707ad8e81c6223228706e6c66f
font_01_sfnt_off00007a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 12400 bytes
SHA-256: d1ca70a9fc81539ff321c30681b70ec26f602f73f24c35d6d8bb8d49d02f0eaa

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