Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a491d7aa4742df7…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 14:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8e549988bb57c728ae6b13fc1a79299 SHA-1: a6e13def83b13850897b624ec2e57d91df98b22a SHA-256: 1a491d7aa4742df71e6edbf403b6c2a61c8a81e9a732052b52acc668db5ff2c4
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to ttraff.com, which is a known malicious infrastructure. It also features a link farm of 15 PDFs hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector. The document body, though partially garbled, contains the malicious URL and a call-to-action phrase, suggesting a social engineering lure.

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=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+chuy%25E1%25BB%2583n+t%25E1%25BB%25AB+file+pdf+sang+file+%25E1%25BA%25A3nh
    • http://files.drinkgreatteamarketplace.com/uploads/1/3/2/6/132695574/2786406.pdf
    • http://files.glsgroupllc.com/uploads/1/3/0/7/130775387/riwesirilizif.pdf
    • http://files.guyinspired.com/uploads/1/3/2/6/132682966/sijepumiv_xukogoruka_xobanorokonulod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/68165319990.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/rojamuforusasopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/47035516890.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/fally_ipupa_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/1836472017.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/65410432220.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/46193383153.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/34713679517.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/90383412926.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/buxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/json_to_yaml.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/xumavosogobinujoxu.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_off00005c88.bin
16e1b86c896db9198f5de78e4ebff99860a89b217fb133149d4af0b0b4cb18c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 6636 bytes
font_01_sfnt_off00007128.bin
93e2802fe90ec837ac2553099afd61c818713ab8a179591da92c77d97d516c57
pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 11220 bytes