Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a7054742ddf0c1…

MALICIOUS

PDF

55.5 KB Created: 2020-08-09 23:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bda22421479e492608f1610b88fb56f SHA-1: 288ae9a2aac629316df14661a19f0922d44a8a83 SHA-256: a0a7054742ddf0c119018d16b8166ffa68cfb4ae626c6b8aea948d3660d753d2
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.cc, a known malicious domain. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to Shopify domains. The ML classifier strongly indicates maliciousness.

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=sherlock+holmes+short+stories+sir+arthur+conan+doyle+pdf
    • http://files.deepaklalsaini.com/uploads/1/3/1/4/131407194/moperexuni.pdf
    • http://zirijad.colligangolf.com/uploads/1/3/1/4/131407089/xuziger.pdf
    • http://zadidasoz.shoptheothersidegifts.com/uploads/1/3/1/6/131606490/nakipubiko_guxofafaxejat_zobefew.pdf
    • https://cdn.shopify.com/s/files/1/0433/9377/7827/files/dafilikesomo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/65691454403.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/65363426394.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/semiconductor_device_fundamentals_robert_f_pierret.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/gojafaruvupikaravopepuwor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/tulobako.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/wojinizugujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8596/3169/files/18928805727.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/bifomam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/48421083876.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/3000_most_common_english_words_with_urdu_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/mac_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/53381817980.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_off00009a72.bin
bddd9c39abc5d8e61c86e297ef929834f392e7bbb3f3a5b73828652ab2e7486b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A72 5664 bytes
font_01_sfnt_off0000ad96.bin
8de4a963c0db5081fe58f9f67155bdbc545a2f1b87d848cd944e2de67177db57
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD96 10328 bytes