Malicious PDF — malware analysis report

Static analysis result for SHA-256 3321cde2213c0283…

MALICIOUS

PDF

38.7 KB Created: 2020-08-30 16:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba20db0a7af16db05030bc1f6002bcf SHA-1: b3b3f7f21a38d1bb085518a3509a53128c123aad SHA-256: 3321cde2213c0283f356a2c9be0caa03ed5d9153845dd0e1423cdd112846df94
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a subtitle download. The ML classifier strongly indicates maliciousness. The primary malicious URL is ttraff.cc, which is used to redirect users to other content. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for free content.

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=hzgd-063+free+download+eng+subtitles
    • https://static.usrfiles.com/ugd/87a178_3ba890a54bf54bf8bd0ab3004f1a85f1.pdf
    • https://static.usrfiles.com/ugd/696117_bd6005b636ff407895fbe071b247fce2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a260537d8644b40bfbab4801e197c7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbf90df8ae845fba507f72abba8354c.pdf
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/75713557582.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/usa_flag_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/75441535784.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/live_tv_channels_philippines_free.pdf
    • https://static.usrfiles.com/ugd/9e41f0_769dc3c5d57d4dc98f331d867f2ba143.pdf
    • https://static.usrfiles.com/ugd/b8c837_531afa0bf6e04d9a977a40609040b82a.pdf
    • https://static.usrfiles.com/ugd/b8c837_881cf17a5c4749aba71450fa4b908378.pdf
    • https://static.usrfiles.com/ugd/696b8a_acfaf7a9e2644794b950152daa46b196.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0741/files/70742420280.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/2831279446.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/1998_toyota_tacoma_owners_manual.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_off00005891.bin
c4470fbf6c4dcf522729812c93bc36c0be19f2782fe6c5fe9bf44008003d014d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 5812 bytes
font_01_sfnt_off00006c7c.bin
5b6ca3bcda20d99868a1cec9109d08cd3a9e1132dd23bf2119aea38546fa5284
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 9856 bytes