Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cf8fbeed19cda9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-29 21:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09cbe34a02e61c06d2737e40b0b28c19 SHA-1: 54f7cf4fe74c04a20aa0ff0725c33b485572426e SHA-256: e2cf8fbeed19cda955fd8f8e6fcc998762aedc5d9babbd58067ece24f2ba642a
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be a link farm hosted on Shopify. The primary malicious link, https://ttraff.cc/wix?keyword=try+everything+song+download+pagalworld, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and suggests a lure related to downloading content. The ML classifier 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=try+everything+song+download+pagalworld
    • https://cdn.shopify.com/s/files/1/0434/2454/6972/files/exercises_on_simple_present_tense_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/ielts_academic_writing_task_2_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/sumin.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/89615213462.pdf
    • https://static.usrfiles.com/ugd/b8c837_71205bbc53eb4b099c60c9424b31e795.pdf
    • https://static.usrfiles.com/ugd/b8c837_f123701d040f4e1290fc6ee77226c2f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e125ae4e91294d01ae199ca72fba06ab.pdf
    • https://static.usrfiles.com/ugd/e4ff69_3ad93440b2904616b07ba5c53fef08e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f166e2c1d215496f9fdefdc1a5be1c93.pdf
    • https://static.usrfiles.com/ugd/d43733_19f5b89bc5ba4507a3ce388d368c3324.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/zasofaxenetiruwofusibob.pdf
    • https://cdn.shopify.com/s/files/1/0460/3143/7983/files/free_sheet_music_harmonica.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/debapovukupuriz.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_off00005752.bin
9e79dde09acbb60ea472acd35a3da3cbe094575dccda1c6bd2cca3e4ee833acd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5752 5424 bytes
font_01_sfnt_off000069de.bin
17817c45e6f59beff3b2049784e09237632fb9bc0f256eae8dbcb85ddfea5f25
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DE 15268 bytes