Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b6965c9c17bc5b…

MALICIOUS

PDF

56.4 KB Created: 2020-08-30 15:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27950962925862c95651f8e43e074b3a SHA-1: ef43171be227f3a5bb80001846cd0641a3c18f88 SHA-256: 05b6965c9c17bc5b57b678f5f6d5b0aced1c9f6f911595a40d547be6f65eb667
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. 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.cc/wix?keyword=abaqus+python+script+odb
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/9cc572_8dd76fdd5b5342709fa1993bb77742f5.pdf
    • https://static.usrfiles.com/ugd/3aca14_1bea5734e3074b31b868e3e34e09994f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cc99874ed64601ab3f186fd024d79d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
    • https://static.usrfiles.com/ugd/b8c837_475ea5f403834e1c956264d8c682346e.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/dalavub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8711/9007/files/estrategias_para_mejorar_el_aprendizaje_del_ingles_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/18468235895.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/dumelaxokuwef.pdf
    • https://static.usrfiles.com/ugd/63d3ad_061cc89ad3d54a27b902beeeef88d482.pdf
    • https://static.usrfiles.com/ugd/4725f1_250b04f14e3f4062946930d911eac1ed.pdf
    • https://static.usrfiles.com/ugd/5ecadc_39702b45784149cd9956e1175ad55a56.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ae98099124d4e1a86b3c9530ce728b7.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_off000086dc.bin
99222d40ee233fd715df354f747bfae3007f571073dfef9892b5629c0d2659ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x86DC 5252 bytes
font_01_sfnt_off00009898.bin
8c79bd5c23e5f36ef5c7bc0898453f9bcc57179a6704eaadb6bc2183f05991b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9898 14856 bytes
font_02_sfnt_off0000c6a3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 4324 bytes