Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f2f963d68ebfa8…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 22:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af38498ff7793177a917ca9091859fc SHA-1: 437f691a9d66718da981c941c967c2c86e17cf3c SHA-256: b4f2f963d68ebfa8e407e9aa1be65ec0db8d3002ea76023af54e26aa30a64594
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=technical+writing+exercises+pdf'. This URL is presented within the document body, disguised as a link to technical writing exercises. The PDF also contains a large number of external links, many hosted on shopify.com, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive 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.ru/pify?keyword=technical+writing+exercises+pdf
    • http://files.ebizownersolutions.com/uploads/1/3/1/3/131398222/zesedenosi_timet_lunobibabozilot.pdf
    • http://files.essexcountyhatchery.com/uploads/1/3/1/3/131379111/mexebijepogefun_nuzotizizanawom_virid.pdf
    • http://files.glamorousreputation.com/uploads/1/3/2/3/132303269/6c1654da.pdf
    • http://files.katemathiasauthor.com/uploads/1/3/1/3/131379761/2228638.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/worebagewurapumuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/98166703175.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/adorno_dialectic_of_enlightenment.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/fibebosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/ravidifozedukonis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/56167209938.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/84297950948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/liczba_mnoga_angielski_wiczenia_dla_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3432/files/consulting_company_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/gist_say_n_on_spotify.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_off00006e16.bin
211e210ac9d61a56eb2f22573227b1f19125273bd8f1a0afec151124c1612bba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 5528 bytes
font_01_sfnt_off000080e8.bin
51a3ab3677f6558f35ea95bfd914040b60bcc1f5dbb725db19871603d4aad6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 10024 bytes

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