Malicious PDF — malware analysis report

Static analysis result for SHA-256 b391f1bfff8a22d2…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 13:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef03ce6baec1355b1b91a409e30d66e SHA-1: 811e6a1d4ad1496d7f3ae95c403baeed50593bb1 SHA-256: b391f1bfff8a22d285b8386107e5b175e12ff55bf88a56796d0390d906eec0a7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to external PDFs, a technique often used for SEO poisoning or to obscure malicious redirects. The primary malicious link, https://ttraff.cc/pify?keyword=manuale+di+biblioteconomia+pdf, is identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for a PDF document.

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=manuale+di+biblioteconomia+pdf
    • http://files.olgaflamenco.com/uploads/1/3/0/7/130740524/baromixagiz_saritebilorizo_zinijep.pdf
    • http://files.centroashe.org/uploads/1/3/2/6/132681513/e4924844.pdf
    • http://files.hccvermillion.org/uploads/1/3/1/3/131397927/baniladesokadag.pdf
    • http://files.simplyinspiredrentals.ca/uploads/1/3/1/8/131856326/xerutejuzi_wovufakefakur.pdf
    • http://files.vielka.com/uploads/1/3/0/7/130776327/dolezoxitukugas_furiwonufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/7028357036.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/15248673890.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/retigijuxawalolipenolovaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/59698206296.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/33437414968.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/discord_friend_server_layout.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/surone.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/vijipojaredetobimej.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/sepufad.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/27638517895.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/toyota_corolla_automatic_transmission_service_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708d.bin
72f6c761cfebf645a8188de1ced25dac2808dfe5cd02ec5639d1fd6e42fb5243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 5172 bytes
font_01_sfnt_off00008224.bin
ac0cfd16f472c2c6add6230eedc0cd968cb98a6acfc984b32053d34bf59c1c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 11336 bytes

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