Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3c50ce3fd48e24…

MALICIOUS

PDF

49.7 KB Created: 2020-09-01 02:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f06f8399ff0732af4e7d7cd29445fdd2 SHA-1: 9469c895018983ee9ddef7f0c41d72991ab84e3e SHA-256: ea3c50ce3fd48e24cef13d306af2c5c5a67458a0c40e2058aa501370cb450faa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests an attempt to direct users to malicious content, 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.link/pify?keyword=format+html+code+in+visual+studio In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76156b_15d454289f3e458ebc0dac0aee4a7f4b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_4299ed6b238d44879f4527cb9a7fd32c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5926b4_b78ef102b5674622be9ac8af04add28a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5b0760ebcf8242cf9a594d4b66f2709a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eda9ba_a05349deba2b4e21a4c2f600855fad14.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/41a0b6_e255f38e75bd433b82d1753ede5b1b7b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf79db_ee52a03f66b74b9daf53ed4b28e41854.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_3edf02095a994653b61d385b30150ef0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/cents_to_dollars_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/anamnesis_formato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/simple_things_miguel_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8188/2013/files/birth_certificate_correction_form_meeseva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajomuxufukurojudi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000773b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 5076 bytes
SHA-256: 9d31dcbbda99c798e1e4ff0460f049a761e9df7841dba9952bfdb3c73740c3e8
font_01_sfnt_off00008851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 10420 bytes
SHA-256: af7400de054dbb2d28a71b5341ae86ec2428755e9f42cc64a1fca0fd6cc5259f
font_02_sfnt_off0000abee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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