Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48895edeb6f2c25…

MALICIOUS

PDF

56.4 KB Created: 2020-08-15 00:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa367fc113ef9fc5ef24fb5d4515b56d SHA-1: c2eaab8ae24b4291197b36683685295787d2ebde SHA-256: a48895edeb6f2c2521f8b823549355b7dd003d80cc63727b352e9214549753e0
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is embedded within the document body, suggesting an attempt to trick the user into clicking it. The presence of numerous other links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=code+128+font+truetype%2528+ttf+format
    • http://files.bluesteeltm.com/uploads/1/3/2/7/132712006/bebogakagi-majemakosoje-nubivel.pdf
    • http://bilij.lauramccallum.net/uploads/1/3/2/6/132681464/gadajufipawanir_fatopetinuteta.pdf
    • http://files.vimpsatthehockey.com/uploads/1/3/1/6/131637038/108680.pdf
    • http://files.blossomingbookwormswithstephanie.com/uploads/1/3/1/3/131398006/sowutufu_popeba_topuzep.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/70045692745.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2582/files/15624636452.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/lowes_abington_ma.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/62248074599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/55616351694.pdf
    • https://cdn.shopify.com/s/files/1/0452/8783/3762/files/cambridge_igcse_computer_science_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0454/3745/2438/files/belgaum_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0449/3220/2651/files/9814771635.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/33195275485.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/93840125436.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/waviguzozoxizalixefodab.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_off000099c6.bin
d46bdcd9b10b836b66e7f524e5ad3d0c9e88c17c0235608a076098b482d7c265
pdf-font-stream PDF embedded font (sfnt) at offset 0x99C6 5440 bytes
font_01_sfnt_off0000ac49.bin
cafb98546ee36a445d24516e39e5f3e5bd1b6a9f21bade33bb32ff21f2d7c02e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC49 11840 bytes