Malicious PDF — malware analysis report

Static analysis result for SHA-256 391bdbcb58269ef6…

MALICIOUS

PDF

38.2 KB Created: 2020-08-24 23:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6730c6bbeaf58749f47108914488bcf8 SHA-1: c88726e8428e55ff012d37201a06e22483d7cc5b SHA-256: 391bdbcb58269ef6467c8afb73674f0ddf23b52bfa844498713001f299b5c92d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning attack. The document body contains garbled text but includes the malicious URL and a benign-looking PDF filename, likely intended to appear legitimate. No scripts were extracted, but the presence of the malicious redirector and the link farm structure strongly indicate a malicious intent to drive traffic to harmful sites.

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/pify?keyword=biopsicologia+definicion+pdf
    • http://tudepoguf.locksmith-plumber.nl/uploads/1/3/0/7/130738638/7083379.pdf
    • http://nedisowig.nineonefiveapparel.com/uploads/1/3/1/3/131379578/nisenakamukesolap.pdf
    • http://files.ahhs60.org/uploads/1/3/1/3/131379343/sazububuzuma.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/16822019250.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/keep_mac_from_sleeping.pdf
    • https://cdn.shopify.com/s/files/1/0430/1606/1091/files/pusagekugowizivudovidot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/pulawor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/57927286062.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/definition_of_authentication_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/mivebelijipifiwigozinexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/free_factory_auto_repair_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/husqvarna_yth2348_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/gogutiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/monemoraxuvifoxik.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_off00005a25.bin
01a218e5ca32a33d0bac4d6bb407b904938f194891c8cd54d6cb6b8a2a2992e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 5276 bytes
font_01_sfnt_off00006c22.bin
ed09982493e7d91b3f7cac3fb6310ae814f66e7ccd54189c660383c62d4158b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 9416 bytes

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