Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70cfb9b1eae963a…

MALICIOUS

PDF

78.6 KB Created: 2020-08-11 21:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cbfcd73c6b018b4bea7abe8840b389f SHA-1: 8fc7f61485a1613681a86cc52568e9de8e9c4b98 SHA-256: b70cfb9b1eae963aca6b888f7ea12cc78b74fbdca72cac2577a09d0776f9e51f
136 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a fake invoice lure and a download button further supports the malicious intent of directing users to a harmful site.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=room+agreement+format+in+marathi+pdf
    • http://nuwumazo.bcproductions.co.za/uploads/1/3/0/7/130776485/6241639.pdf
    • http://ninikej.elbeephotography.com/uploads/1/3/1/8/131856333/gifigemomojumub.pdf
    • http://files.guillome.nl/uploads/1/3/0/7/130738889/turaf_vufoge_tifasebiwenufi_tovigotageni.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/lokikuxurixikuvaxuwil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/spiderwick_field_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/pofuwunoveda.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/78096551725.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/iron_carbon_diagram_theory.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/2d_arrays_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/lojagojuvokawotivenewofu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/45836046074.pdf
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/58833151291.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/jalepadivegolizimawol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/10210484229.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/semujodit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/mathematical_logic_problems.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/22615215181.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc7.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 2828 bytes
font_01_sfnt_off0000d7c2.bin
3446316f1627032fe97a02fdd047f542bb8d70005938ebf9822541eb5852c92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 5040 bytes
font_02_sfnt_off0000e8b0.bin
389cadcaa1f82a9f28c5c9349fdd671caf17b8466856bb7569dfa31bb0d02610		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 10080 bytes
font_03_sfnt_off00010b20.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B20 4324 bytes
font_04_sfnt_off00011922.bin
e921cc46912381667ba30e40048273f12e8b86a46b35a31f1374de570de047b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 5120 bytes

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