Malicious PDF — malware analysis report

Static analysis result for SHA-256 b434b35e4e706aa4…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 12:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aa997c398813df6876ffe90fdbe6627 SHA-1: e54a5e08cb003cfb49d8dcc3782664e6069d3691 SHA-256: b434b35e4e706aa4bf26f4e1b93a49cc28c78fbf01769b3f56e2b42adbb151ad
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, which is the primary indicator of malicious intent. The document body, though garbled, contains text related to the periodic table and a URL that matches the malicious redirector. The PDF also contains a large number of embedded links, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious 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.cc/pify?keyword=details+about+periodic+table+pdf
    • http://files.farcornersmusicals.org/uploads/1/3/1/4/131453084/kirazim.pdf
    • http://melim.thepalmerlawfirm.com/uploads/1/3/2/7/132740978/monetix-zizigitukin-tuxasadirujul.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4885/files/11436031999.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/39659767268.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/gojobakofizideri.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/83975538449.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/pulanojipikobiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/87122329662.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/62896517900.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5842/files/79560465706.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/46419330749.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/6532226283.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/sujiwuxuruzosu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/33808334507.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/new_telugu_dvds.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_off0000621a.bin
bbf2944345116cb00300ea52abe6f14341072cd3d1439efa2cabbd756675d924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 5288 bytes
font_01_sfnt_off00007424.bin
407581fe8e312b30b4a06683a397e8c8855064e52d44acad38d1fad5868f3740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 10072 bytes

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