Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f2fa14a8e148cc…

MALICIOUS

PDF

48.9 KB Created: 2020-08-23 02:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daefa9a948bc8ba78b5991d60bceeb9a SHA-1: e5dcf4b5329bf1ffe292b8a2a99bc8ebca50a903 SHA-256: 27f2fa14a8e148ccb9e22d24434a88e46b127d9347344d0af8f91add230985a4
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. The embedded URL 'https://ttraff.cc/pify?keyword=bollywood+music+instrumental' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting the primary goal is to redirect the user to malicious content. No scripts were extracted, limiting the analysis of further execution steps.

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=bollywood+music+instrumental
    • http://files.annastump.com/uploads/1/3/1/4/131406999/ziwelinuvegi-sidef-subepunepej-tivelilikafume.pdf
    • http://zemimij.paranormalinsightuk.com/uploads/1/3/2/6/132681670/gogogik_nuvoja_lujife_pimus.pdf
    • http://files.makeupnskinbysilvia.com/uploads/1/3/1/6/131637108/5534160.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/rafogaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/jarat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/6810895318.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/2822970044.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/rebatilevolakapada.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/bescherelle_grammaire_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/rijazidibaxiferegutolur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/54151305961.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/buwofujezapikuwitopaberep.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_off00007378.bin
a9386b8368416ffb521d669ce9878220707419fcfc1d95d9382363ddffcc18e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7378 5212 bytes
font_01_sfnt_off00008524.bin
11fdd99e408a66ca8214136b15bc855a2b07684b762e57c6f4ce20e4307a5457
pdf-font-stream PDF embedded font (sfnt) at offset 0x8524 10328 bytes
font_02_sfnt_off0000a882.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA882 4324 bytes