Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ae73fa66e37974…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 14:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e36cfe9c098bc8baa127823a60b6e77e SHA-1: e9e53f93330544da2a58d7f7fe5d89573d38d8ee SHA-256: a5ae73fa66e37974ca7dfc02d450a8218546e0dc2b5ec3a8755c6666f3a0bac2
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL containing a search query for a movie. This suggests a social engineering lure to entice users to click the link. The ML classifier also strongly indicated maliciousness. 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.com/wix?keyword=snake+on+a+plane+full+movie+sub+indo
    • https://static.usrfiles.com/ugd/b8c837_5bb86361a6684cd9b42b940a0947f070.pdf
    • https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0e3ef11d18d40e08e4589f0ec716641.pdf
    • https://static.usrfiles.com/ugd/b8c837_30ad8b8df5de4255b9aa4b0275a22718.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_dab7842fd72d4eb99a4d25800770ddea.pdf
    • https://static.usrfiles.com/ugd/913720_d47c47100d25489fa8d533523890761d.pdf
    • https://static.usrfiles.com/ugd/b8c837_49723570578744938ae893b0c9c2b14f.pdf
    • https://static.usrfiles.com/ugd/3f80ec_595ec8d474344a7a98561a0beff5fe47.pdf
    • https://static.usrfiles.com/ugd/ea2f88_2e7f7874c6d3425eafa9dbb95ed3c21f.pdf
    • https://static.usrfiles.com/ugd/a48928_53f538a84829468bb41bf063ec3486ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f0478cb90445b1bd23fb2084d983f9.pdf
    • https://static.usrfiles.com/ugd/ac72e0_c433c49e7c624473947723a07e328539.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/desumubepuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9805/files/50310112928.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/bronchiolitis_obliterans_organizing_pneumonia.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_off00005558.bin
a3c10dc879e5a2583b90670857a7b664b54af17e71b5649bfc1c9c13871cfc34
pdf-font-stream PDF embedded font (sfnt) at offset 0x5558 5460 bytes
font_01_sfnt_off000067ce.bin
c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 6640 bytes
font_02_sfnt_off0000796d.bin
f9239169e1ef1adfb33eb2354e996f483f4308e50cd571a891e03c83806f541e
pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 10128 bytes