Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87549303c0a0011…

MALICIOUS

PDF

45.2 KB Created: 2020-08-03 15:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671d334063060aea012ff02d41c817d0 SHA-1: a2e48f80009e853972574f2dd8ab5f6770eaae2f SHA-256: f87549303c0a00118fd1bac819f5f2df9db2fa63639fab84935419743c2cedea
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=pierce+basic+category+theory+for+computer+scientists+pdf'. This suggests the document is designed to direct users to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of many links, including those pointing to benign Shopify domains, indicates a link farm SEO tactic to obscure the malicious destination. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent is clear from the redirector 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/pify?keyword=pierce+basic+category+theory+for+computer+scientists+pdf
    • http://files.wholearmorministry.com/uploads/1/3/1/0/131070469/ropiterominulalewox.pdf
    • http://gevuro.laurelhistoricalsociety.org/uploads/1/3/0/7/130740013/2682853.pdf
    • http://files.thorneaircon.com/uploads/1/3/1/6/131637546/jujokeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/dms._vizio._vom_link.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/71227307193.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/41355072601.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/dopuwiwak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3625/3087/files/geek_charming_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/74938610270.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/33414285166.pdf
    • https://cdn.shopify.com/s/files/1/0433/6471/2616/files/47259145438.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/left_boy_dangerous.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/786_269_2542.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/18267749946.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_off000063df.bin
c731415598494176c8968bef978ce8af1e1818087c9e1b64442baa4059dfd411
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 5660 bytes
font_01_sfnt_off000076f0.bin
ad07f72057b864c8168402f15e5d8fca3c80e5eab071ddb3406e92fc2f07ba5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 10096 bytes
font_02_sfnt_off0000997d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x997D 4324 bytes