Malicious PDF — malware analysis report

Static analysis result for SHA-256 b188408c79b25afe…

MALICIOUS

PDF

44.8 KB Created: 2020-08-02 05:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24336391d11ed0330a56d7665a8972ed SHA-1: 80d5f0e115fc24b282c3bd0d4d19f9d2c636faef SHA-256: b188408c79b25afe7adad968992dd671cca133a60d780d3f21254b32bfa5a336
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, suggesting a link farm or redirection scheme. The primary intent appears to be directing users to malicious infrastructure via the ttraff.cc redirector.

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=local+web+server+windows
    • http://files.region19sai.org/uploads/1/3/2/7/132710780/2b9cd6860.pdf
    • http://files.bosselitehockey.com/uploads/1/3/0/8/130814225/tewaxinoxopabuw.pdf
    • http://files.staffordgop.org/uploads/1/3/0/8/130874085/653df86c.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/fuvogekidefijekoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/nevexipiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gafafidimibaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/3718/7493/files/50839678642.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/72713897088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/42250041912.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/32041652990.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/zurozewor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/77977999936.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sibubemazalomasedexikeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7054/5308/files/jufunaliv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600f.bin
d683d182ef3abab539985d31a3fc94c9a55e7e2bd9c915c21b52eec23111cc52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 1604 bytes
font_01_sfnt_off0000681f.bin
55e69fb96b67ced2d16775fca96b731cbbf127e31310043a2d986ca029f104a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681F 5164 bytes
font_02_sfnt_off000079cd.bin
fb837d8d2e7b6ff876074993d1faa48c00f8652074d5e7b79bdb67b3eeb562c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CD 1888 bytes
font_03_sfnt_off000082e0.bin
52f383da1dfe3eebf176392da0f4af9d5034914609c6a49077f78269eb2b9952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 10288 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.