Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9615e7c3f3e5098…

MALICIOUS

PDF

47.9 KB Created: 2020-08-19 00:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d556932d61c46ef60cdac3656deab8f SHA-1: 7ac42cb85a84cb4fe7fff599b67580f60fd8ea2e SHA-256: f9615e7c3f3e5098281a238d4c8e66a3fd7600b491652e941ad72548ee4d26d8
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational material, but the primary link redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=medical+mycology+mcq+with+answers+pdf', which is flagged as malicious. This suggests a social engineering attack aiming to lead users to harmful content.

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=medical+mycology+mcq+with+answers+pdf
    • http://files.rairasensei.com/uploads/1/3/0/9/130969434/lekuburasibime_fefatis_febutog_ratanerizogax.pdf
    • http://files.mrcattclass.com/uploads/1/3/1/4/131453998/d63caf6b.pdf
    • http://punisaj.elkvalleypainting.com/uploads/1/3/0/7/130775162/nekijox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/apery_constant.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5395/files/87789879481.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/damodar_valley_corporation_act_1948.pdf
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/badland_brawl_mod_apk_unlimited_money.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/59850882397.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/blest_be_the_lord_satb.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/45503261411.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/second_law_of_thermodynamics_download.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_off00007a98.bin
0c98f08f9a89623f41fc198451907bebc44a0be0cf8475f0e690430e75f82b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A98 5896 bytes
font_01_sfnt_off00008e98.bin
0764089e1e8937ca3cb7e7682427710be014989d0df1d59ee90571b5ccf6c2eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 10184 bytes

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