Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeba648a78aa6410…

MALICIOUS

PDF

46.9 KB Created: 2020-08-28 07:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b9f8714485eb3503311b6040235ff1b SHA-1: 27d9046cea10ae3818c790d50b82845d03679ddb SHA-256: eeba648a78aa6410109718c22745be1ce945c4a8223ec30b111b5a826db88842
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=is+whisky+better+cold'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting an attempt to lure the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=is+whisky+better+cold
    • http://files.recordhorn.com/uploads/1/3/2/6/132681783/vufiriga.pdf
    • http://files.goldengobletrestaurant.com/uploads/1/3/1/3/131384605/raruxolepukeb_zobibemupinu_femivaji_xajavevom.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/55223061520.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/xigaduvagijazejudeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/97023251753.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/31784621643.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/essential_english_words_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/tratamiento_balanitis_candidisica.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/laliluvigegat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/information_architecture_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/hex_code_to_rgb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5711/9386/files/el_bautismo_de_fuego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/54137801523.pdf
    • https://cdn.shopify.com/s/files/1/0428/5772/6118/files/bupemu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c47.bin
0589f4f76546018b21ff7fef36cd30e3d17bfcd3220c62ed9c0e338f1ff36e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 4832 bytes
font_01_sfnt_off00007ccc.bin
b9170438f44394c863ec703540e89fcaeb65f4b984b653f4e7e32947cc131752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCC 10592 bytes
font_02_sfnt_off0000a08b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA08B 4324 bytes

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