Malicious PDF — malware analysis report

Static analysis result for SHA-256 491da13875de88f0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-17 16:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ee159dc11e70f2ced596f9eb96ea9fa SHA-1: 6b45b7a29dd7efdbfbf3f5d0df79e4115c66916e SHA-256: 491da13875de88f014bf4cdd74a459e4621bd4de241bf445c04345ecc584f23b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of linking to external, potentially harmful content. The presence of a 'SE_LOLBIN_RUN_COMMAND' heuristic suggests that the document may also contain instructions for executing commands, possibly to download or run further payloads. The primary malicious URL identified is https://ttraff.ru/pify?keyword=calendar+format+google+sheets.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=calendar+format+google+sheets
    • http://jegewof.garlandsullivandesign.com/uploads/1/3/1/0/131069766/0329d.pdf
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • http://files.see-ff.net/uploads/1/3/1/3/131379990/ff2cda40f1f02a4.pdf
    • http://files.taichikungfuacademy.com/uploads/1/3/1/3/131379510/8fd24c8f89f.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/33037215825.pdf
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/58363211941.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/divina_commedia_con_note.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/simple_present_and_past_tense_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/cbse_computer_science_syllabus_for_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/66914388630.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/powershell_ftps_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0199/files/82146575275.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/8245645466.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/42907588563.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_off00006396.bin
87ce49779c61421f3408a9a680c8f14bfe8ade49ec19377b83b83f75c0eea8e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 5228 bytes
font_01_sfnt_off00007532.bin
dcce59495c1a95fe35792fcf65efacea5f8c0ee483ce44562e66150f8e240d65
pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 10408 bytes