Malicious PDF — malware analysis report

Static analysis result for SHA-256 f21b5352b595653c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-14 10:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a1650fc6a3c91591477f70b3904e02c SHA-1: e8f99f5d5d753e33f06f094960e00b3349abadf3 SHA-256: f21b5352b595653c3b5f5957f46c3eb0f2b3cd9e71c5413fe4b9627181dcabac
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a mass external PDF link farm. One critical heuristic firing indicates the presence of links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=habitat+organic+cotton+sheets'. The document body contains garbled text but also includes the same malicious URL and numerous benign-looking Shopify URLs, suggesting a potential SEO manipulation or redirection scheme.

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=habitat+organic+cotton+sheets
    • http://files.safercompass.com/uploads/1/3/1/8/131856224/bometibodawazexupo.pdf
    • http://files.lillyandhayles.com/uploads/1/3/1/4/131438120/nazoliti_zodedovu.pdf
    • http://files.empressreadings.com/uploads/1/3/0/8/130813654/8470633.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/kogupuvebubalopotexerif.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/81426610019.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/ibps_exam_material.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/90234632379.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/46332163436.pdf
    • https://cdn.shopify.com/s/files/1/0435/3838/3007/files/free_rigged_3d_models.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/sajopixivalo.pdf
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/cambridge_advanced_expert.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/denumofujetumewev.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/buddhism_as_philosophy_siderits.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/delosarazaxunubafefuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/jepoxojudis.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_off00006a27.bin
4d25cbb003e3fb195139d51849ebd0a1c5ef5420cd52e8f41b33abc5e1d29fb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 5128 bytes
font_01_sfnt_off00007b8b.bin
2e25122a0abdf0a0c1f8d66da4222405738ac281c3201e5195fee1612d154fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8B 10328 bytes

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