Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca7ec0e2ba78d70…

MALICIOUS

PDF

82.1 KB Created: 2020-08-29 04:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f969a4f482adf75ff89877c3d86f5c5 SHA-1: f35e0e481026da881dee6c7397c7c39e0922a61e SHA-256: aca7ec0e2ba78d70f1005be337a42b1b0f62242b7d144c0c1d680c2bce30c1bf
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external links suggests a link farm or SEO poisoning attempt 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.ru/wix?keyword=the+legend+of+zelda+breath+of+the+wi
    • https://static.usrfiles.com/ugd/b8c837_ef891daf819a411d8820d15b218be065.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a8e0ad90d7486ab4fa58b75ac43acf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e743e309f0464d0c8406f27b12852f59.pdf
    • https://static.usrfiles.com/ugd/b8c837_4947f2c62b194e33afa7c93d8e621d0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_15861b91b164477fb0af47f3fd67a988.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/57619190009.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/soxeruxit.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/happy_birthday_cake_name_pooja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/42714830870.pdf
    • https://static.usrfiles.com/ugd/b8c837_a537ae959a0645fc88f83c3f9f9ff5cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_479b3f72c64e40299062c282b159bf7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_67212efc73d74239844be4f70bcf6f48.pdf
    • https://static.usrfiles.com/ugd/b8c837_8221df293f34443090efad4619acccae.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/84381089772.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/3204917285.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e7.bin
da415d9ecf4b34777cfbf4e327b14b7c5d5e81ede8370a92ba241809d047db99
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 15300 bytes
font_01_sfnt_off00010498.bin
313b74c8a0d133f866a03577a9b0becf6267df430e8202dd0523539799d0acad
pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 5224 bytes
font_02_sfnt_off00011672.bin
a22eb595d247f0d06cebe14ceabcef4c7b86cfbee30c50677f4d037788dc0c8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11672 10588 bytes