Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34c2b74b73f1961…

MALICIOUS

PDF

44.6 KB Created: 2020-08-24 02:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 428bbbb446d6a26742b8cd4c31353d9c SHA-1: 6b135a98c274d160a2357a6cdfd37e469bc7615f SHA-256: f34c2b74b73f1961861a1b2209ec763741a827127a65785c42420409141609db
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

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=chrysophyllum+oliviforme+satinleaf
    • http://files.couragechildprotection.com/uploads/1/3/0/8/130814714/a76c363172.pdf
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdf
    • http://files.stuartkraut.com/uploads/1/3/2/6/132681772/17329.pdf
    • http://files.emmausny.com/uploads/1/3/0/7/130739891/gukedol_zofovomozefoto_wexalek_nawen.pdf
    • http://tebivi.hayfieldsecondarychoirs.com/uploads/1/3/0/7/130775506/38c26b27d1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7974/files/zawomikefuseku.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/meniwafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/fuvizibegodofamukopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/39895950624.pdf
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/57150074053.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/37938452303.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/54702512736.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0152/files/tukepuxatugatezepozixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/axial_flow_turbines.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/muvavora.pdf
    • https://cdn.shopify.com/s/files/1/0437/6805/3909/files/dopedabiditujadon.pdf
    • https://cdn.shopify.com/s/files/1/0461/3917/9161/files/69435810298.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/e8fnk_info_ffmpeg_vp9.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_off000071de.bin
13785e564bf9220f886b890812240c2c8319e53199b110e47ae05ec43ce2215a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5208 bytes
font_01_sfnt_off0000837b.bin
e6f7cca24ef8735b45058eb9d61a84f8362af00aabbf53e817c9197d63494d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 9940 bytes

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