Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d62adc7bba742…

MALICIOUS

PDF

61.5 KB Created: 2020-08-07 08:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9945d779b4a9e29cdca5d911972c58 SHA-1: 327fd96894cd5e6c0c96d18972f53b9097511db8 SHA-256: 620d62adc7bba7420e674ed73d085785015960d09a2c86f25e90b53ded580248
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or to redirect users to potentially harmful 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=anamorphic+illusions+pdf
    • http://files.kashcraftmsn.com/uploads/1/3/1/4/131452804/vodufeze_gosedakinoton_faduwubokimu_tejugufope.pdf
    • http://files.premierebasketball.com/uploads/1/3/0/7/130739069/5340979.pdf
    • http://files.michellestartzmanmetalwork.com/uploads/1/3/1/8/131856624/vutukawelo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/nixaxubitapabirob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/zekam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/css_background_image_size.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/28936903821.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/gopuzufizokoloz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0432/2849/6036/files/97816294050.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/concepto_de_anualidades_en_matematica_financiera.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/supazinidogoker.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/equations_of_linear_motion.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_off0000aaf9.bin
0b966d53de793b31bc30e50ed27103c349635e16b8e451568209dd222df9beb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF9 5384 bytes
font_01_sfnt_off0000bd1f.bin
0d3bc11607575af5916c54fd8a8fc7400b1f51f2a4cc10e9eb1536fc24a6946d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1F 14148 bytes