Malicious PDF — malware analysis report

Static analysis result for SHA-256 0462459e696a33e7…

MALICIOUS

PDF

42.2 KB Created: 2020-09-02 11:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6cc9af805953e2bbcd1c4721b2ce8cba SHA-1: 9f8ac07417d2fc1269a62f90497e041e36656864 SHA-256: 0462459e696a33e7ad15c38c4ae7e91e5671f285247d9388fb12e121169d5825
154 Risk Score

Malware Insights

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

The PDF 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 the primary lure. The presence of many external PDF links suggests a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites.

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.club/pify?keyword=custom+rom+for+tecno+j8 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/ba3095_5234396b1f1344c3b5aa2eb2471fb5c5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5a943_65bf504bbc6f439f88b7e549a368c730.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/12daa7_a842c057cd18459d96e4c0b3ee1c812b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca300b_c19b55ae12c44669bf08f56c08aaa412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/repaso_de_algebra.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b222ea_032848d1b1244c41834e720c5ddaf049.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2eedf1_4cfc3dca132d4894afb79e8d9315e3f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_827273defede44d1b6180b8bfe373ef4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dd4472_c6ed81a2d38f4d47831de846d0594240.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c068f8_2ff6cbaa5a8745719369d5aedf6082b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/717a42_a4f7a515e7114aa691e41aee7ae6ae58.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B2 4960 bytes
SHA-256: e5b5da376e7a336264f666f2a2e8645defad26f2ff262a2a999b43639981d46d
font_01_sfnt_off00007883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 10524 bytes
SHA-256: fdd3262c97e2afe02cbaf1d06e880423b7bac0450c69f983baa8f404d69a6350

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