Malicious PDF — malware analysis report

Static analysis result for SHA-256 7275b99703d8c97f…

MALICIOUS

PDF

40.5 KB Created: 2020-09-02 13:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07efcf668b465343cbf50cb11647497e SHA-1: bc1dc2e1b55c6a1c38e129e10c0b4d583d952d6b SHA-256: 7275b99703d8c97f1590c4a23b5b287aabd713693df4569d49188fd3f484e80e
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.link/wix?keyword=business+letter+template+without+letterhead In 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/b8c837_ef332902125d44f09dab24f6d572cbe8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4ee87_4af4a68b855b487f97db3cddb3d38df7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/585b1d_71ddfe646ad744feab36849375ceafb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/36f25b_02b0b6ddfe504749ba4fcc8229b2a2a4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bf0735_dba1621a15b54dceb5f362858932876c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fbc05465ae0a4ac48cead0826860b0c9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c6c1_ed14fb0d46344250b929255d5c04c470.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2c11272175974cbb830bac88bda7f0e5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6943/1959/files/greensleeves_vince_guaraldi_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/52805940245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/robamimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/zipabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/figuras_de_origami_para_principiantes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/93221400360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/6692580840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/hoe_bestand_kleiner_maken.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_off0000614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 5340 bytes
SHA-256: 838928441735ab9421428c6af71399dbf9649be9f32b9132e70cf4b589d86d20
font_01_sfnt_off00007354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 9860 bytes
SHA-256: 1363baee3f6d58af1a96d8f4244d8058b32ee0aeb1914beee17306f0bf01b99e

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