Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208f69eb0cd766a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 02:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53cbc6cbb0ce234e8a08a7f3e1f04657 SHA-1: 3d6dad4c62a56113581610121d316630cd3b0405 SHA-256: d208f69eb0cd766a7dd6eb2dc4806ff0897338fefb33cc2034d9b47ddad75cbf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL for the malicious redirector and several other PDF files, suggesting a lure to download further malicious content. The presence of numerous external links indicates a strategy to distribute malicious payloads or phish for information.

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.ru/pify?keyword=chat+alternative+app+free
    • http://files.awhillans.com/uploads/1/3/0/8/130873781/fa6d13970d3.pdf
    • http://zitagiwe.firstlutheranpreschoolec.com/uploads/1/3/0/7/130738721/fagagijarasi.pdf
    • http://files.lukalahfarm.com/uploads/1/3/1/4/131409442/nugojederefa_bupebijefazix_dopijon_tabolutap.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://files.jamestowneducationfoundation.org/uploads/1/3/0/7/130738889/wegeravuwub.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/plural_of_rhino.pdf
    • https://cdn.shopify.com/s/files/1/0439/0001/0664/files/34409950720.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/91348788613.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/wesepawinumunujopolavef.pdf
    • https://cdn.shopify.com/s/files/1/0428/0877/0726/files/sopuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/la_cabala_y_el_tarot.pdf
    • https://cdn.shopify.com/s/files/1/0441/4350/9656/files/encoding_and_decoding_huffman_code_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/nezeselobalapowir.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/relod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/fovubasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/duxusubukodumafugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/tovosusobedopebetoteni.pdf
    • https://cdn.shopify.com/s/files/1/0441/0979/1384/files/moreover_furthermore_in_addition_exercises.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_off0000676f.bin
455245a5a131338f3ca9a7c5a15aa2af4b9dba737aa40ea0d707d7fe4c0feb53
pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 4776 bytes
font_01_sfnt_off000077ae.bin
dfd41f714793b6bcb0cfb4579c636f200bb5c3a1c500b5c9035ca33add8d19b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x77AE 9888 bytes