Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fdc6d864b7d792…

MALICIOUS

PDF

35.6 KB Created: 2020-08-18 21:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6700f39d685613d912be7e1aacb2d8ca SHA-1: ca8341bfbad9e2ce99900ef40eb3bd87083ca3e2 SHA-256: 64fdc6d864b7d7924836a9fab040baa306f1228980ce8313af4e39088a765617
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Bahubali audio song' and a URL that redirects to a malicious site. This suggests a phishing or scam attempt designed to lead users to 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.com/pify?keyword=bahubali+audio+song
    • http://files.weisbeckerscholarshipfund.com/uploads/1/3/2/6/132695576/991b4797ce4a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/26529002841.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/botatenudunavimaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/solidworks_2d_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/bsc_physics_vector_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/osama_bin_laden_biography_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/vipekawuxisita.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/one_hundred_and_thirteenth_rule_of_acquisition.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/vemizapif.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0072/files/magic_arena_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/wusokobibalila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/48045184568.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_off00004f1f.bin
950d35bb4da62e4bec693b8a2cbea605e3c940fa62af3907e7fa287d7b3cf689
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1F 5180 bytes
font_01_sfnt_off000060ac.bin
5608c1e044fa87c145701188a287c3539f17bbab94e7ec81f796551a863ef52a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 9708 bytes