Malicious PDF — malware analysis report

Static analysis result for SHA-256 383f05dfd6518bbd…

MALICIOUS

PDF

35.9 KB Created: 2020-09-01 09:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2335b413eb27c1e2455cdccb4481e119 SHA-1: 01c4e073330b184abbc04614b6e95ae1e1bfe3cc SHA-256: 383f05dfd6518bbd4120d1649e86532df53ef6781651a76dd4ccd3de1408430b
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/pify?keyword=apc+smart+ups+1000+user+manual'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the target URL and other PDF links, suggesting a social engineering attempt to trick users into clicking through to a potentially harmful site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=apc+smart+ups+1000+user+manual
    • https://static.usrfiles.com/ugd/61b8bf_8291c9f351374d70b02422e8e9f31baf.pdf
    • https://static.usrfiles.com/ugd/277b62_18e015efd1714972aaeed8d57091af94.pdf
    • https://static.usrfiles.com/ugd/b8c837_133d4397d13245c8aac7a98d672075fb.pdf
    • https://static.usrfiles.com/ugd/18f527_63b417d4c1864cd0bde6583cc84ae489.pdf
    • https://static.usrfiles.com/ugd/2ac701_d52f712f1f5f4f1f8b42e349726a7811.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/rimivotemijefolovadem.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/everstart_plus_jump_starter.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/tokopuwexog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/gaginazumajituk.pdf
    • https://static.usrfiles.com/ugd/8a419d_ae8418c76f2c4072ac722c7cdf0285f8.pdf
    • https://static.usrfiles.com/ugd/4c1554_f1d716a5a9304d6e84df59f0c84235a1.pdf
    • https://static.usrfiles.com/ugd/16a96a_ae9668d7844d46d6bc1084b29d15273d.pdf
    • https://static.usrfiles.com/ugd/3be3a7_b9aa32e2138f4ccf8b82eb82acad96a9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/border_light_apk_android_5._0.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/47348715954.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/27783044644.pdf
    • https://cdn.shopify.com/s/files/1/0432/1948/4839/files/7387964883.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_off00004bcf.bin
8e0cb4969c0a82a6988d7d9a67c912049629c4ed14ebe14a7c9be2f3e6626ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCF 5260 bytes
font_01_sfnt_off00005d9b.bin
c2efbbaf42e83058ec3dd196e3a94a1bbffd5533a4dd2547023de026fcaf80f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 10388 bytes

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