Malicious PDF — malware analysis report

Static analysis result for SHA-256 c790cc95cc1412a6…

MALICIOUS

PDF

62.5 KB Created: 2020-08-26 00:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33069281f90008393ee8d7155b1c083d SHA-1: 7e6d9ef529a02983ef312aaab3c82001d82b3543 SHA-256: c790cc95cc1412a696719e2adc521cc3b5f784b700fe96aca3c05c3bbec8ce31
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Self esteem workbook for youth' and the malicious URL 'https://ttraff.cc/pify?keyword=self+esteem+workbook+for+youth'. This suggests a social engineering lure to trick the user into visiting a malicious site. The presence of a 'download button' heuristic further supports this attack pattern.

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=self+esteem+workbook+for+youth
    • http://files.heels2wheels.tv/uploads/1/3/0/7/130776499/07810b2.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/ocr_online_converter_to_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/nuresodiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/44108379261.pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/99524584320.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/25801400843.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/70427255582.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/63484577922.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/wifetesesebodiwiwabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9813/4941/files/52720754890.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3577/files/30605599831.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/pocket_oxford_american_dictionary_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/64485915850.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_off0000b7d5.bin
a338312e453a819b7350663802da3cdd65b40b31fc6f4381d5f979c5eb109b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D5 5300 bytes
font_01_sfnt_off0000c9ce.bin
73f930e4f478cff8ddf0eba32cb07317c501c13917fe4d1f08674d211eb260d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CE 10316 bytes

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