Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc4f84a344f7a6c…

MALICIOUS

PDF

34.3 KB Created: 2020-08-24 06:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7182c8ef5d9e29c3e960b5b5fae3dea1 SHA-1: a7cd84cb8f03b68554688706aa0c232a5bcf4be7 SHA-256: 2bc4f84a344f7a6cadb3dc923b8ea9cde2db257acafc61697c8ffd70a994ccf3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=billian+billian+guri+ringtone'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external PDF links, with the first identified as 'https://cdn.shopify.com/s/files/1/0437/0645/0074/files/23833109039.pdf'. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary purpose is to lure users to malicious sites via a link farm.

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.ru/pify?keyword=billian+billian+guri+ringtone
    • http://files.processfc.com/uploads/1/3/0/7/130738755/e6f223ed31e0c2.pdf
    • http://files.lynnhainesspiritualmedium.com/uploads/1/3/0/9/130970008/8c2251fce61a.pdf
    • http://files.keepthomascountybeautiful.org/uploads/1/3/1/3/131379168/gatidedubobage.pdf
    • http://files.foryourmilitarymarriage.com/uploads/1/3/0/8/130814411/vixolalawedu_gixanewupabov_vojol_nejavagegapel.pdf
    • http://files.ruralchurchpastorsnetwork.com/uploads/1/3/1/8/131856166/0c07c28fe43.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/23833109039.pdf
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/anonymous_hacker_pic.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3242/files/sonigibaxudaxenumevob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/fudenurinezesoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/labadunogite.pdf
    • https://cdn.shopify.com/s/files/1/0438/0160/8349/files/ronasidojamez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/zididuwowabalijulureze.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/31246071353.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/gugibikatixujovefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/take_courage_bethel_chords.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_off000049f2.bin
bf37420a315d5891946698b3f753d4cb23a9450292cb67eaed5373004c98faf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x49F2 4864 bytes
font_01_sfnt_off00005a85.bin
17b332da64b6acdcf6e31ce08e1ea037009c1b53e3e88f2ec9d3f292e08b277c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A85 9852 bytes