Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6608bed7a66356c…

MALICIOUS

PDF

59.3 KB Created: 2020-08-23 13:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141d28b13232413dd7c1f17299d99242 SHA-1: 19c2e2bb9caa8b2f47d7ee61cd01a2e18f6d234e SHA-256: e6608bed7a66356c67b258439c62a04cde622fd561e88f4e711289f93326ea36
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, which is also present in the document body. The link leads to a URL that is part of a link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. The document body text, though heavily obfuscated, contains the lure text 'America's Got Talent champions winner performance' and the malicious URL.

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=america%2527+s+got+talent+champions+winner+performance
    • http://dunulev.calyculin.com/uploads/1/3/1/3/131383943/pigetaxidepav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/tutorial_assembly_language.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0552/files/christmas_color_sheets_for_toddlers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/gavurefuxunawimogaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/the_very_hungry_caterpillar_food_colouring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/20703671159.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/glow_lighting_effect_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/12285837617.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/56010775536.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/sotimuw.pdf
    • https://cdn.shopify.com/s/files/1/0464/7436/3048/files/ffvii_materia_combination_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/3289/3857/files/brush_calligraphy_alphabet.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_off0000a90a.bin
c2a70b160b0c4f9a8aefc73ff0f15fae36a8a6ba363e3510f44453c79ef31aeb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA90A 5544 bytes
font_01_sfnt_off0000bbc7.bin
7644466dd883b8734207f84507163855de530193139a65253848dc4feb43262a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC7 10936 bytes