Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40a85b501fd085f…

MALICIOUS

PDF

44.8 KB Created: 2020-09-18 09:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80b9f5bc7ea04bb934fc3229b6d7844c SHA-1: e98720650f6792a19085c78e6bff20ae91c8afcb SHA-256: a40a85b501fd085f4639458b75be59e91df72855d428d972098c5347db61c195
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links, 'https://ttraff.club/wix?keyword=how+to+answer+que+hora+es', is flagged as a malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing.

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.club/wix?keyword=how+to+answer+que+hora+es
    • http://bavasu.totsandco.org/uploads/1/3/0/7/130776089/zuwir-gilatewil-sisas-fajid.pdf
    • http://janabiwof.zaraworth.com/uploads/1/3/0/8/130874633/5783655.pdf
    • http://files.cocinamilonga.com/uploads/1/3/0/8/130813521/gunikutiv.pdf
    • http://xevopize.abcchildbirthservices.com/uploads/1/3/0/7/130775934/xuzalarilife_vakego_losarol_kurajofebuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4663/files/34835905487.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/5690092203.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/adding_and_subtracting_polynomials_examples.pdf
    • https://c09c7001-6f02-4a4f-8c4e-ac22515ae28d.filesusr.com/ugd/811c4f_d3623f2d4fb9429cbd6ce2cd9bdb2615.pdf?index=true
    • https://4658686f-acc0-46f7-994d-25608f9d4265.filesusr.com/ugd/a32c20_9133da5b34084fb09dd6483a19aae0fe.pdf?index=true
    • https://4ff6fa94-8b32-4e86-b77f-044b89f8ca1a.filesusr.com/ugd/02beb7_a200bcb2920b4613b727495220ca2324.pdf?index=true
    • https://710d64ea-ff65-4501-9a52-dc69888bebfc.filesusr.com/ugd/ee6770_1d5a724cd89f46f8859a781b5d420190.pdf?index=true
    • https://f8bf5462-b568-4a74-997b-00c025ffa507.filesusr.com/ugd/9c8fb9_df276e59a72d4eb78d2bc79346ec347f.pdf?index=true
    • https://61b5c727-8286-4bf9-8de7-86d1f311ed85.filesusr.com/ugd/9374a7_08808441246d499fbf80ef1ce4512a2d.pdf?index=true
    • https://758e3fa1-f8c3-498c-b6fa-5e4f427dd641.filesusr.com/ugd/0cd019_e49901cda47b46f4bd51de630f14b9bb.pdf?index=true
    • 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_off00007319.bin
3045bbd7fa1b367ce709e0fe22f171ab6d92f7218b043e7760c142bc436178da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 4920 bytes
font_01_sfnt_off000083df.bin
0c4438f3a2ffe67685bda6c6ab228e1a6f89270ffbcdbc0dec50478ea5ca338f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 10088 bytes

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