Malicious PDF — malware analysis report

Static analysis result for SHA-256 84634e96489bc497…

MALICIOUS

PDF

47.1 KB Created: 2020-08-22 06:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d166313f5e66ba076b22ae6a6daab855 SHA-1: 78bc23c9fe651c43137b6da7e0dc84fbf9f3c4e5 SHA-256: 84634e96489bc497584aa4f4469277614dbf16ea8648cfbf9efbc2fb07f3c396
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are flagged as a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme, suggesting the PDF's primary purpose is 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.cc/pify?keyword=c%252F+o+kancharapalem+movie+naa+songs
    • http://files.1872platbook.com/uploads/1/3/1/4/131437005/mofaliro.pdf
    • http://jemuzuli.mcleanmsband.com/uploads/1/3/1/8/131856161/pinoge.pdf
    • http://zakabox.extratimeconcierge.com/uploads/1/3/0/7/130775565/fc095a32a7.pdf
    • http://dizubofa.llamasdelsol.com/uploads/1/3/0/8/130874493/galunoj.pdf
    • http://nolupikut.michaelmackinomara.com/uploads/1/3/2/7/132740763/3ae4d144989ee.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6226/files/69203454909.pdf
    • https://cdn.shopify.com/s/files/1/0431/5198/2754/files/40404969723.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/zelda_breath_of_the_wild_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/lixixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/xakezusunewid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/47155729049.pdf
    • https://cdn.shopify.com/s/files/1/0451/0826/5125/files/libros_para_mejorar_autoestima_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/motenomepufurimatisug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/29389601910.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/38727458219.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/zasaxivuwu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007445.bin
ebb3441af9898a7b28084fc540f84a5354b47bb919bfea5fb1017d04eff14fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7445 5412 bytes
font_01_sfnt_off00008698.bin
5da063cfa8cc4520dd7c016f2b2073f62aa170c889e2949b79946eeb74a01a33
pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 12900 bytes