Malicious PDF — malware analysis report

Static analysis result for SHA-256 614a9f983607a16d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-23 09:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70ff5fd799a90269afdd24034b928bdb SHA-1: 10c9afa05cb439b36eb1d1dafb4eef435d8c28d6 SHA-256: 614a9f983607a16d3bf4613cf8d5981d5707d937774ed2b2f8fc0351c540e598
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and multiple URLs, suggesting an attempt to manipulate search engine rankings or redirect users to malicious content.

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=kendo+grid+popup+editor+template+mvc+validation
    • http://lugas.alvin-hwang.info/uploads/1/3/1/4/131407424/25668f2d005.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/kilubamigodulexid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9624/files/86089945888.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/statistical_significance_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/plural_nouns_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/68318331038.pdf
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/62734598366.pdf
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/descriptive_adjectives_worksheets_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/nilixejolusovomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/wolusefilabire.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0942/files/8250186892.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/fabetule.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_off00004f0e.bin
dd7080274d8e9e2138efc466a5107c8859759eb3fed67386687a158e62f9246d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0E 5244 bytes
font_01_sfnt_off000060cc.bin
48f44e4c1c2da3be2d943891bf40b765aae2c48e24faa1b44da4d2768dd68c91
pdf-font-stream PDF embedded font (sfnt) at offset 0x60CC 6520 bytes
font_02_sfnt_off000072bf.bin
5d4f7505fc640102bb48feda68ea72f8132994461b553e056a543e7786fa4b19
pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 10584 bytes