Malicious PDF — malware analysis report

Static analysis result for SHA-256 845134a30cbb9935…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 14:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a09238dcefee7acbb0e65a6053840fe SHA-1: 84e597bb0d13f1f0c01d46c96f90cb5bc93f822f SHA-256: 845134a30cbb993580420f3fc845627b2f8b210e9d1bde2dfa077a2d6213b9cd
152 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.cc/pify?keyword=china+movies+in+telugu+dubbed+free`. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a drive-by download or phishing attempt. No scripts were extracted, limiting the analysis of direct payload execution.

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=china+movies+in+telugu+dubbed+free
    • http://files.holytrinityberlin.org/uploads/1/3/1/0/131069812/5a0b3.pdf
    • http://zenel.littletownbakeshop.com/uploads/1/3/0/7/130775795/aa236c0862.pdf
    • http://files.framemysore.org/uploads/1/3/1/3/131384789/7349004.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/2083438865.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/mutawabalapofoweval.pdf
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/stronghold_hd_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0430/8035/1897/files/xonivadukilomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/55485500410.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/fumozunupomo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/the_artist_way_julia_cameron_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1288/1564/files/cracker_barrel_lafayette.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/tibelasabobipebivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/40929216957.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_off00005d08.bin
a200f8777df79d8fe70f0b4a5dc6b32f23d368fc8cee7d6b1defbe7a71d06edd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D08 5428 bytes
font_01_sfnt_off00006f43.bin
991f7ef292b59849fa1804c361c52a6255426db797fbcab3b5d31d1f34ee76c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F43 2116 bytes
font_02_sfnt_off000078ee.bin
c2a7895decbaabe9cce8ae2b3f8bee25b131a4b74ddb81ff75d95092ea0c6dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 10376 bytes