Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1d0718998ae4db…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 21:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31d3e09ff3b8882f1b041c14f0c83ce5 SHA-1: a3708790a5ff3f7cbb5b42292c83aa9a40f423c8 SHA-256: aa1d0718998ae4db17c2d635c18d5650e22582466b277bf8daefdbdd2bd34934
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a lure for remote support tools, specifically mentioning TeamViewer. It also requests recovery secrets, indicating a phishing attempt to gain system access. The primary malicious URL is https://ttraff.ru/pify?keyword=teamviewer+free++softonic, which redirects to other resources. The document body, though heavily obfuscated, contains references to TeamViewer and the malicious URL.

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.ru/pify?keyword=teamviewer+free++softonic
    • http://files.donaldphysiotherapy.com/uploads/1/3/2/7/132712508/871718.pdf
    • http://files.revelationranchphs.com/uploads/1/3/1/4/131409498/d4e1fc6fc59917.pdf
    • http://kubona.rhsorchestra.org/uploads/1/3/1/6/131637309/a2fdbf94fc6e3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/bodybuilding_diet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/poxizimirufowosovipobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/54311429511.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/17099731592.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/16365218193.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/56194271130.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/powuseruzoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/resikizoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/joniz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/84421378117.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/tetubipobepanapiradaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdf
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/angles_of_regular_polygons_worksheet.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_off000060f2.bin
3830af33d46a14cbfb1a8a228e6c55891038d599cd4a2f40a3a4be2ec1060413
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F2 5096 bytes
font_01_sfnt_off00007245.bin
47058c211505e9a8002d8c7d56791e3f49b2b09828ba56d5ad0271db82ec1fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7245 9812 bytes