Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34ae99e77e543fe…

MALICIOUS

PDF

40.8 KB Created: 2020-09-07 14:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cd18e968a1b91941d9ff670228303755 SHA-1: 5cf2ccdcb2cf1fc0d951d5e72bd3ac136bcf5508 SHA-256: d34ae99e77e543fed8a4ade92b43a71006b6433b7b2d440c5f21b027f00e600d
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.club/wix?keyword=pokemon+game+online+no 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/35e1ce_6e350c8ec5644a96a4e0b7b7ae489287.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2994dd_3751dd11391c4b4a8da950eb9d70d95a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/590778_eb1e2c7914e441c8a4777fd4ed1314b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/538d67_81b97cc0e7c64e5e983583b7c862edfd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6a08c401915e4bd18991ef63afac1668.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dfb5f8_5b1edb14d7494542a8d342f19be206dd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/229b11_8471ec164d0c42f2a4c58d6e8b42ef54.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/55cc32_101086e3a548448da886a609ccf7fc9e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4f0c6_4488f4fd524b435597061979e30ca6b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/696b8a_1827d1e4900441079c1021261da670c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aa14a9_ac53d784897848bdb73bd814eaef43aa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_c20eb92b6cb9488897b5fdd42d1e0f5c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/57154559278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/tifajisobaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/my_dream_house_paragraph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/kangaroo_mother_care.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_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 4796 bytes
SHA-256: a1c179577c8556ca4c5190ef0df7d91107c420209986014421652f8ad808143a
font_01_sfnt_off0000712d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712D 11024 bytes
SHA-256: af0e55ad4076124681aea8e9d73e5895b468d445b9f2ef95a6b1beac765bd4e4

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