Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f10d1fb7edb3cb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 03:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90643cc0d337baaa715237963194d1bc SHA-1: 78ae64bd58c28408b3509c2701e503669f5ec9f4 SHA-256: 38f10d1fb7edb3cb8cbdd5170142d8465d4d956a9c9a3e9c886d28526cdd5dbb
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs, suggesting an attempt to obscure the true malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ac+market++now', reinforcing the malicious redirector finding. The presence of a 'download button' heuristic further supports the lure to click on these links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=ac+market++now
    • http://goriregi.tommytrenchard.com/uploads/1/3/1/4/131437454/lixadixavijukit.pdf
    • http://files.obxchirothrive.com/uploads/1/3/1/6/131606094/gutedinaxada-fedovobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/viravigejebeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/jenabadoleliviwis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/guvuvisojiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/pdf_to_word_online_free_nitro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9843/files/75032815886.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2165/files/bowmasters_hack_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/4373516574.pdf
    • https://cdn.shopify.com/s/files/1/0437/5330/8314/files/fevexewadoxavulolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/ayushya_homam.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/wepefosedofegojodar.pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/gosaropowepesonobedani.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/habitos_de_alimentacion_en_nios.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_off000056a4.bin
6e940780f5c11e765c15cdcd15a3a8a939e353337c1b36d2c6b309f07366baef
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A4 4880 bytes
font_01_sfnt_off00006732.bin
894d9856111b5cf0e1d7ed0dd9158b19c3c895dfe25de8226cc6d6d8db7f70a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 10428 bytes
font_02_sfnt_off00008b18.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 16164 bytes