Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1903e452eba412…

MALICIOUS

PDF

54.8 KB Created: 2020-08-31 03:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2423f5c61231272c15e8ff60a3c655b2 SHA-1: 916dc46dafaaaae374cd60471c2128965f33c9cd SHA-256: 6f1903e452eba412a4be9f7a46467e71e7e1adc8ccf3d75c5bb37b21fc34fc3c
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into downloading content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=le+gayi+dil+mera+manchali+song+downl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8b4006b263a44d7881db2fe21a027e61.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b642fa709444dccbdd7fd3345c83fc6.pdf
    • https://static.usrfiles.com/ugd/b3bc21_8648c67fbb014d20922afa1dd1866454.pdf
    • https://static.usrfiles.com/ugd/20d83a_729a5e5214354cd4b99dd2209ff75841.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/61273203742.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7157/files/35120028336.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/zizelifudixegoxogupata.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/kokofilititevijavo.pdf
    • https://static.usrfiles.com/ugd/b8c837_33f32cba077148099a8a8978c45a8aa4.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_44446b3c1a6a4b4ba78a40b073a90c71.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/guided_meditation_for_sleep_and_gratitude.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/kepisebifuloge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/60965401688.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008953.bin
e52bff9bb6cc9dd57bbff8302870ffcaa9209caabd15425fb8be084956054e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8953 5488 bytes
font_01_sfnt_off00009be6.bin
bc2e71e64b4cc938d96d0a9f87381b676058476ccb81d1ca36faea677e085a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE6 15868 bytes