Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2fe57d36a73cef…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 23:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae5294648a1b6c99776e783eaf085b5 SHA-1: 0a69f68d206e1344f226e8a77a687b7cbc08cae9 SHA-256: 3a2fe57d36a73cef720ebd833d2258c44919d1972ee2af3fcc8db0531e689141
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a 'vertex and axis of symmetry worksheet' and includes the malicious URL. This suggests a social engineering lure to redirect users to a malicious site, likely for phishing or malware delivery. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm technique.

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=vertex+and+axis+of+symmetry+worksheet
    • http://files.saintstanislaus.com/uploads/1/3/1/1/131164063/5645926.pdf
    • http://xipurokis.federationofteachers.org/uploads/1/3/0/7/130739678/17f40a28.pdf
    • http://files.artofkundalini.com/uploads/1/3/1/0/131071037/fujivib.pdf
    • http://files.ericmccarron.com/uploads/1/3/1/1/131163736/5150701.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/kusenuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/zapedovenubobi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/dalenuwanexerixulavesidix.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/62103754367.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5015/files/ragopetuvesijogigafize.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7417/files/acr_eular_sle_criteria_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/2659/3445/files/97725264968.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/31483058661.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9047/files/lumuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/15092253386.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2315/files/minecraft_beta_1._8.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/fake_doctors_note_template.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_off00006283.bin
262dbda98c34a4d4eb162438574745c2ec0dee99e947b7b0480204177f4cbe71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5404 bytes
font_01_sfnt_off000074d9.bin
898295cdbc7825f615de37c1f707dd4b9c67c5f7896f2dfa0d3f14bc6c3f3602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10004 bytes

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