Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4eb9bc0c4f005c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 06:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 510094dfc35067e2a751ab55607f53c8 SHA-1: 8bec3d291cf21b22f78a0f5118db3624967d20c0 SHA-256: 0d4eb9bc0c4f005c39cc1290abe97f48c43e9f2f8abc72bad407fc8ab24b864a
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, indicating a link farm or redirection attempt. The document body, though corrupted, contains text suggesting a download lure for FileZilla client. The presence of a malicious redirector and the overall structure strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=filezilla+client+for+mac+free
    • http://kidexub.brownsantiquesandreclamation.co.uk/uploads/1/3/2/6/132682883/9e4aa253d.pdf
    • http://xobeti.petergibsongrimes.com/uploads/1/3/1/4/131408832/vemasavewoj_mapekivipilito_kufikironitose.pdf
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdf
    • http://files.mrmichael310.com/uploads/1/3/2/6/132681308/9131215.pdf
    • http://files.fredfreeman-figurativesculpture.com/uploads/1/3/1/6/131637658/jezebewafuwajef_numiris_vofulefalufi_tikazimikewezif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/62401372293.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/52584227342.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/54750246357.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/kuxitujerit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/velufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/sotilodamakawedenapexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/xesegelojodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6323/8056/files/jofajamapajalotamo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/25350876363.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_off000060be.bin
b06dc01cf0729e59903337201fce4709790fe3ad7a888e286ef340761757c1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 4852 bytes
font_01_sfnt_off0000712f.bin
99ab499f36efc1442ee65fb1c62ca0887f321709317d1bdc8723e2ffc7ec3f9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712F 13860 bytes

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