Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a721f99233f41a…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 11:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88377e4d9e45a42ec3ff455ebd81932b SHA-1: 6df4ae14921a656bd50f7d3d51b47e2b97db7c8e SHA-256: 20a721f99233f41af01eb1b5672056d8174ed4d420d678026af42a3350bc0536
120 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.ru/wb?keyword=pronunciation%20reading%20exercises%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0433/4888/5662/files/gulorovezoti.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to trick users into clicking through to malicious content.

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/wb?keyword=pronunciation%20reading%20exercises%20pdf
    • http://files.citykidzmag.com/uploads/1/3/1/6/131606360/pavufoj.pdf
    • http://files.factsoverfeelings.org/uploads/1/3/1/4/131406222/4398068.pdf
    • http://files.romuluseducation.com/uploads/1/3/1/8/131856632/6be124590ab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/gulorovezoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9496/files/brazzers_free_access.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/76436761717.pdf
    • https://cdn.shopify.com/s/files/1/0435/6843/1265/files/dikasuxajasewajole.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/betoselisejavusobepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/maxobataratewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/65600750729.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/67550127658.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/bogagukanebigawutivikiriw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/junewefeboronixejor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/15345277409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/vipezaniboru.pdf
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/nursing_drug_handbook_2017_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/35498603291.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_off0000680c.bin
29b655c74d808de12a70ba90b29c8db3e3daa58b1e80e4d9980a4703ae0b6788
pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 5244 bytes
font_01_sfnt_off000079f1.bin
fcb5c4151c3f4edfa719d2647d7449aa152e5678b03257b393e9f3e5ef444d21
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 10292 bytes
font_02_sfnt_off00009d3d.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3D 4324 bytes