Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab65c7f24a6324c…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 21:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8af7b5b45291eaa539bb6ecc740d58 SHA-1: 02b6fa6e6ec77862805a5d1a16ed40a2dd322d5f SHA-256: 1ab65c7f24a6324c76fe4924aed43299943d9d8ea9c565f00fa80e1c8ff9e45c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF document contains a lure promising a free incoming call app, which is a common social engineering tactic. It embeds numerous links, with one specifically identified as a malicious redirector at `https://ttraff.cc/pify?keyword=incoming+call+app++free`. This redirector likely leads to a malicious payload or phishing page. The document's structure and the presence of a link farm suggest a delivery mechanism for malware or further exploitation.

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=incoming+call+app++free
    • http://files.uhighmusic.com/uploads/1/3/2/6/132695258/1754084.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/49971728182.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/xovukapekunibipifanuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/47744341470.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/factors_affecting_acoustics_of_buildings.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/bronchiectasis_nejm.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/56871191172.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/bipajatufipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/gleanings_from_the_writings_of_baha_u_llah.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_off00005bcc.bin
1555879f4682ef4f4875b901fdd68a1a7e94cf497c007ae34f6c9046c432bfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCC 5096 bytes
font_01_sfnt_off00006d00.bin
361d07eb8b22802853e11fe281fc29c11fa506c1de9b86e14c79d08df3c787ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 10192 bytes

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