Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73eec4fda89794…

MALICIOUS

PDF

38.6 KB Created: 2020-08-21 14:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49f9393ca72363b3bd4b096ef594de86 SHA-1: 31e7c3bb0976c5e841efcbf562d86ee1025cb69d SHA-256: ca73eec4fda897948b243701845af1e042dd105d49cf5969484e97d7feca79e0
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=font+blippo+light+sf'. This indicates the document's primary purpose is to lure the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. While the document body is heavily obfuscated, the presence of the malicious redirector URL is the strongest indicator of malicious intent.

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=font+blippo+light+sf
    • http://files.second-childhood.com/uploads/1/3/1/3/131380440/61b271f995.pdf
    • http://files.stonecirclepress.com/uploads/1/3/1/6/131606537/5315b29bf2c586.pdf
    • http://files.7seaswriting.com/uploads/1/3/1/4/131453208/fibopi-fonoveke-pibusaropu.pdf
    • http://files.agapa.net/uploads/1/3/1/8/131858592/8895606.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/44268182077.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/11518242904.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/15446564104.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/achievement_test_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/96139354945.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/linking_verbs_and_helping_verbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/29843823932.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/big_data_analytics_iot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/hallelujah_viola_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/86336692432.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/13108022744.pdf
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/dokovubekikapalumuxure.pdf
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/1679462005.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_off00004d6a.bin
bf6c4f58980b3e250b2bcdb5a89e3e1f5dcad54a8f30cf5df50e507687c56624
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6A 4624 bytes
font_01_sfnt_off00005d19.bin
3e79a7b965387408c3ee05617f76a580337983301bb94cbe7a0c96c2cedfb3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 10028 bytes
font_02_sfnt_off00007f65.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 4324 bytes