Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7acc4101ed4df92…

MALICIOUS

PDF

98.2 KB Created: 2020-08-31 08:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81110024f0d3f56236e96b73cdb73f35 SHA-1: 0c8dfab803545931862628d6b53a183dc25072ed SHA-256: a7acc4101ed4df92c078b3735caed70fc37b30d35071a92244878d2eef4190f5
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, it functions as a link farm, with numerous external PDF links hosted on Shopify, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering through a deceptive link.

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/wix?keyword=the+more+than+complete+hitchhiker%252527s+guide+to+the+galaxy
    • https://cdn.shopify.com/s/files/1/0440/5516/7126/files/porexijuguzilopo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/suwaxenasolekexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5162/files/latukozirapakuxabovivono.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/one_tree_hill_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/83460753286.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/zomumibeso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/calculus_11th_edition_larson_and_edwards_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3960/3360/files/jofinobube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/51218266364.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/74103241188.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/sharp_washing_machine_manual.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_off00013511.bin
4b4f66d36c4540a2c86a3e80bf8963ccfe5a7266826bca205ee8e80da2c16a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13511 5584 bytes
font_01_sfnt_off000147f1.bin
7bfb8fbdc08cab19c65c0624d950380cd1a88828d53009c4bbfaa25e17d433be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147F1 10668 bytes
font_02_sfnt_off00016c9e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9E 4324 bytes

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