Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b551a2990841d0c…

MALICIOUS

PDF

41.0 KB Created: 2020-10-09 06:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bfcba3be1d83336f99946dba9f9c1527 SHA-1: 913a2f36887337fff6f12bce510d42bac1b8da6d SHA-256: 1b551a2990841d0cd8668db208eaf7e62f762dfe72f245398eedba8c02e1a741
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as a document title, which is a common social engineering tactic to trick users into clicking malicious URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the embedded link points to known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=human+anatomy+and+physiology+10th+edition+lab+manual+answers In PDF document text
    • http://files.lessons4learners.com/uploads/1/3/0/8/130873708/ede7087fd1ac.pdfIn PDF document text
    • http://mimez.stlouisfitnesstraining.com/uploads/1/3/1/8/131856293/nakaruzora.pdfIn PDF document text
    • http://ruxile.oyezbookstore.com/uploads/1/3/1/8/131872225/xodosejet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8640/8597/files/devirusevazasowowosevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/96219082549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1760/0675/files/william_burroughs_queer_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6d6c27-c9ea-4b32-8b07-b0482721f92b/8435720819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d6b86e-f522-4a70-84ce-de6f474d21ee/buzikapugaguxerowezufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67d1ccf-624e-4485-9d98-e6f2ae2de640/votivawojuwadixizafigopow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3aa49d5-664e-4567-aec2-6b10d1384718/zesofezokele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/youtube_naruto_theme_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/modulo_banjercito_ciudad_juarez.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_off00005f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 5864 bytes
SHA-256: 5dcd1bb4760faf32da3eb46f3c0775f44031979e2b12623681770a980747f4f7
font_01_sfnt_off00007342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 10212 bytes
SHA-256: 5d2efd200ca378063f5d31649ff00d7d02aac79ff27ae7839c37098ec7d6ecd7