Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4488ed15209666b…

MALICIOUS

PDF

52.2 KB Created: 2020-08-19 03:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9edee6efb21c6b7fa44a4ebad668df96 SHA-1: 5a4c301b8071a15e8f97203898ae838b1b99f346 SHA-256: a4488ed15209666bcad355dadcba0fad5bb3e03e1f69d86963c6387466fe68da
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute content. The presence of a download button lure further supports the malicious intent of redirecting the user to a potentially harmful site.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=solitaire+app+for+ipad
    • http://wovin.philstile.com/uploads/1/3/1/0/131070598/8347737.pdf
    • http://digusetut.altoonahealthandrehab.com/uploads/1/3/0/8/130874493/fatoje_tazusedakeraz_jetet_jawut.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/calendula_officinalis_flower_extract.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/my_french_lab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/cellulolytic_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/xenulojusozuxad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/bujanujefaguxalupajoxisid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/scag_turf_tiger_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8157/9161/files/sisyphus_myth.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/pubagigonalezem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/2317981596.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/99197280384.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ae.bin
55ff575f959a1befd3c934905f950bdbdfe72fec7ab8f7d0c8b8e4fde4664c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AE 4960 bytes
font_01_sfnt_off00008199.bin
9805e4a40aa01ef5e38f927607798d79f831bf710a124e6ab41f02ebdd6e6cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8199 13952 bytes
font_02_sfnt_off0000ae09.bin
c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE09 16376 bytes

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