Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f02e63579f0077…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 11:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f356fb51e2663393f04d1d14f0898a9 SHA-1: 105602f3f3020f24d66fdd2e7715338497d876f7 SHA-256: 67f02e63579f0077e2c7aba5c257d014a51f077e4f6d08f993641c03dd6125b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though corrupted, contains text suggesting a lure related to 'nationalities in German PDF' and includes the malicious URL. This indicates an attempt to direct the user to malicious infrastructure, likely for further exploitation or phishing.

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.cc/pify?keyword=nacionalidades+en+aleman+pdf
    • http://files.pqassessments.com/uploads/1/3/1/6/131636612/8458189.pdf
    • http://files.specsolns.com/uploads/1/3/1/0/131070116/valapuvu-xitofafusibe-gakagilevexopi-xevim.pdf
    • http://files.trinitybaptistchurch.org.uk/uploads/1/3/0/8/130813668/9700727.pdf
    • http://files.scottbrianhewson.com/uploads/1/3/1/3/131383698/vuvozilapoviput.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/80432385033.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/jogonezubatones.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/bizaladofigesidejisiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/93272352184.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/jiroko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27347714529.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/97152752997.pdf
    • https://cdn.shopify.com/s/files/1/0433/3813/7755/files/felokewivukivimijawetetig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/36944243195.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/32156339830.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/vejojelenesozaw.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_off00006420.bin
197f85bce5a46ee6ace5b9082bf43fa2f7cdaefa5e1326846be962bdba5c2174
pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 5176 bytes
font_01_sfnt_off000075b3.bin
2742b491fc6715bf03c4e52018203acff4a286f66c3445005d5ae1e3f77d0103
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 15560 bytes