Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ae021566f0c4f6…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 17:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a3c78e5421f1dbd93ea65d6bd8ee30 SHA-1: c937d11f6cb671add4e59f671349ee66b768201f SHA-256: 81ae021566f0c4f6325efa74ee65ecb38c3868c35dc0918faadd025669b5b6b0
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=tumblr+mobile+header+size'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, suggesting a lure. The primary intent appears to be redirecting the user to a malicious site, likely for phishing or to download further malware.

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=tumblr+mobile+header+size
    • http://files.fdbda.com/uploads/1/3/0/7/130776407/vilozetepoveru-mumowufupewi-gekinalevu.pdf
    • http://files.preecelightning.com/uploads/1/3/1/3/131397987/jimega.pdf
    • http://files.fashionbysitaramysore.com/uploads/1/3/1/8/131856071/81c7b65.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/lekipakorunogux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4158/files/92971438549.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/25403461750.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/belukesir.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/45397227314.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/95092265260.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/fagusejogixalat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/tozaduduz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/vagelep.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/bavijefaretefiriperep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/16158678535.pdf
    • https://cdn.shopify.com/s/files/1/0435/7849/1041/files/senisututezopolizamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/23664360202.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_off00006b69.bin
5c4201edb39b820bb373755af4dc7c76463c7bb83ac663b774204cc07741195f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 4900 bytes
font_01_sfnt_off00007bf8.bin
8bb19d1552f9b15448be5b7fa56a76e41abf22a4b9fc1a71f2cb23098ef5033f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF8 9952 bytes
font_02_sfnt_off00009e01.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E01 4324 bytes