Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2e10b6bd914b1e…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 10:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13f62ed97cd0b4225ca4c9807a880680 SHA-1: 7778b8178ad08fa54f23ea2d138ac229382b0d86 SHA-256: 7a2e10b6bd914b1e4526b80d24b42cfed2edf80eb22866c6f506d706857f020c
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'excel conditional format if cell contains text', and this URL redirects to a known malicious domain. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

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.ru/pify?keyword=excel+conditional+format+if+cell+contains+text
    • http://files.southforkwatershed.org/uploads/1/3/1/4/131454452/wexudizufebowej.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/24761523790.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/agenda_escolar_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/wiwasovudesuvemowidekiwer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8881/3988/files/94238238954.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/sedarojiwak.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/hansel_and_gretel_grimm_brothers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/jean_anouilh_antigone_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/housefull_4_songs_pk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/1109746977.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_off00005df0.bin
ea0901a652a400f6290d4a0aa3ada72b7e411a873163b7d26042ef0efe66d7e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 4980 bytes
font_01_sfnt_off00006eba.bin
03fa7ce718731298106ce793884b2d1a42c5808353720ca5ca1c8ab3efb1958d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 10104 bytes
font_02_sfnt_off0000914d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914D 4324 bytes

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