Malicious PDF — malware analysis report

Static analysis result for SHA-256 6258695cf1db81cc…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 02:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 966b547f587b688bae3ed954bcb30c0f SHA-1: b85327644934fde3888ddf6e0e3f70335a8c2768 SHA-256: 6258695cf1db81cc98786374a586e98a7d2b40a51d3ef8bae97757d759967de0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains the URL that leads to the malicious redirector. This suggests an attempt to direct users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=iowa+quit+claim+deed+template
    • http://files.competitorone.com/uploads/1/3/0/8/130814340/koveti_lozirimu_tenezirif.pdf
    • http://sadeja.monasedrak.com/uploads/1/3/2/8/132814930/gepavewuwow-setedufo-dujagexa.pdf
    • http://files.harvestbaptistchurchmd.com/uploads/1/3/0/7/130739525/zedazinudikog-kujabavorimajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/penguin_books_level_6.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/80639064075.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/tosujaxexepaminu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/rudexudogoxur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/xivuxawumiwaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/66075177184.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/fanon.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/99820775471.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/dabavumujipilogovexexuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/26230793052.pdf
    • https://cdn.shopify.com/s/files/1/0435/5696/2465/files/what_does_edith_stand_for.pdf
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/duwofajakutezosof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d7.bin
a337f6f941d896147a056c64e42ec932809472221829027503fa0a01b6936b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 4876 bytes
font_01_sfnt_off00007385.bin
c562e337a9dde3f9267d5d95a20703c21ff8189768bd943d7de700a1fedbfeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7385 10064 bytes
font_02_sfnt_off000095e6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95E6 4324 bytes

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