Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1a30283ac159ab…

MALICIOUS

PDF

45.5 KB Created: 2020-09-18 12:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb265773ea444203f12f0384ca20cd0 SHA-1: 479f7e519a291f838d3f3d8a2b15a522fe6e94ee SHA-256: 6b1a30283ac159abe058ebea2e8c0e79624bf7b123b9ead35029c4803a3ebfa0
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'petroglyph animal hospital prices'. The presence of multiple external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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.link/wix?keyword=petroglyph+animal+hospital+prices
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://a76be9ea-132e-4731-ae25-d1e9d4d07c5d.filesusr.com/ugd/76aeb6_02b595aff6264b5aa15fa3455eedeb18.pdf?index=true
    • https://0fc261db-2c07-4bbd-ac47-e5c9e726a6aa.filesusr.com/ugd/359e64_abf4a1c3c0a74023846adebcaedefc7b.pdf?index=true
    • https://1da92464-f141-45df-ada1-895977d38edf.filesusr.com/ugd/3eed2b_eb369cfa780e4470bc7306448b16bf8f.pdf?index=true
    • https://e9352e2c-d606-466a-9784-4b9fd6fc9c8f.filesusr.com/ugd/685707_fce840a13ace48988e4efb93e360a207.pdf?index=true
    • https://e6b3a09b-cf52-49ad-aa37-d062a7168157.filesusr.com/ugd/b0c8dc_7ab82e3a53cd4da8aebc6d0a07f757ef.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/sports_in_society_issues_and_controversies.pdf
    • https://cdn.shopify.com/s/files/1/0434/5289/1297/files/brimonidine_alphagan_davis.pdf
    • https://cdn.shopify.com/s/files/1/0454/7185/8838/files/jet_airways_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0464/7603/4198/files/55963216298.pdf
    • https://cdn.shopify.com/s/files/1/0435/5224/3861/files/mesa_mini_rectifier.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/zisomibimeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/lezumesuj.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_off0000663d.bin
de4799bc761f80c7b0cda459fd399c5f7a31d4f1f7d6d58ea93e6030729f1be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 5240 bytes
font_01_sfnt_off000077dd.bin
488562ad7e5bbca9b63e258572ff86f62bd265dbce54d1a355c2206ec438a1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10120 bytes
font_02_sfnt_off00009a7c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 4324 bytes

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