Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0499a40088a5c5…

MALICIOUS

PDF

48.5 KB Created: 2020-07-26 22:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04af3452729ce2f5ec5132675a42a35 SHA-1: 40109495a20d65edb38046d1019883011a1ef9d2 SHA-256: 3b0499a40088a5c51152c42d927e6539e933d71b1ea4b693ffa5c2edc94646c5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ayo+and+teo+songs++2019'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://cdn.shopify.com/s/files/1/0433/1631/4277/files/87599292813.pdf'. The ML classifier also flagged this PDF with high confidence. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its direct content, but the heuristics strongly suggest a lure to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ayo+and+teo+songs++2019
    • http://files.dannasdogs.net/uploads/1/3/1/4/131453615/8639146.pdf
    • http://files.canbuildimmigration.com/uploads/1/3/1/1/131163736/jasit_zafajig_konaburawuw_pulale.pdf
    • http://files.priestlakehaven.com/uploads/1/3/1/6/131637546/javepumepitafob-lisitovero-jezafuf.pdf
    • http://files.faithfestus.com/uploads/1/3/1/3/131380842/muzorudogate_fekejikugonuwid.pdf
    • http://files.dannasd
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/87599292813.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/36063395435.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7365/files/figevejixavenaxotulexiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/59150705731.pdf
    • https://cdn.shopify.com/s/files/1/0434/9578/4600/files/kepozadanikalunug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/7612454076.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/kebotebiwok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/xaxumagob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/10081375497.pdf
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/10246069129.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/rejimovoridaduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/87781517176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10217245918.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae0.bin
761c45321731f907eec7eea62bdd7fde654bbbfc2f9651a7600b8ebdfad45269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5180 bytes
font_01_sfnt_off00006c86.bin
299ccbd244173198cf8fdd885ae38931f76548a680b1e85fc8db4fb6d5cf7448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 3232 bytes
font_02_sfnt_off000079a1.bin
c49c506ef4d503efb60bb72057ece72d7aef542c7d29e68fb437f7dea546617f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A1 10580 bytes
font_03_sfnt_off00009df2.bin
4931c3d288e3ed5544613b42d530a3d8d5f0e2847844b11b99683414a34d9777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF2 16364 bytes

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