Malicious PDF — malware analysis report

Static analysis result for SHA-256 a599a56866f3c992…

MALICIOUS

PDF

42.1 KB Created: 2020-07-30 12:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a300795d0cf8d51a7d8f80d24c139f SHA-1: ddd022f6273a893b62328a041cd4acacff8b5ab5 SHA-256: a599a56866f3c99274b516c0c981f81343586704e798b2ae25242f60e8074280
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically flagging a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be part of a lure. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious IOC is the redirector URL.

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=x%25C3%25B3a+1+trang+trong+pdf+online
    • http://files.rareapparel.co/uploads/1/3/1/3/131381679/3072934.pdf
    • http://files.flavafitnessdownsouth.com/uploads/1/3/0/7/130740053/nozulozuvejogobuva.pdf
    • http://files.greatbearframes.com/uploads/1/3/1/4/131454207/9e2829204786b4e.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/63685490014.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/41866237654.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/96196284590.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/rujozewewiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/57084785171.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/85193655903.pdf
    • https://cdn.shopify.com/s/files/1/0430/3201/9097/files/futado.pdf
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/rafaper.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/70897824195.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/43680229006.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/20623134613.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_off0000667c.bin
c06f60192a1cf5635a5bf34e74cab25773abe229c4deb5192ad59c7dfa2d258e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667C 4984 bytes
font_01_sfnt_off0000773e.bin
5f0987bb7b5b3b310ee390b342c25a8e8ac5778645b9c4cb99cb7ae9709f6506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 10068 bytes

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