Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62481e4cd31a3ba…

MALICIOUS

PDF

42.7 KB Created: 2020-07-31 15:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25067c3234377bf042d5f9f57f60f59 SHA-1: a05e0d05829b5cbdda91d17ff142223919027c0d SHA-256: e62481e4cd31a3ba7f3ceb218556eab45b38873931fdd03878fe044e50a358c7
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is designed to lure users with a fake offer. The document also includes a large number of embedded links to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=xbox+one+license+transfer
    • http://files.vcmg-us.com/uploads/1/3/2/3/132302732/fukekozosesibodine.pdf
    • http://files.stgilespreschool.org/uploads/1/3/1/6/131637081/9ece6.pdf
    • http://files.swarthmorehorticulturalsociety.org/uploads/1/3/2/6/132681670/pujalezexitebubixin.pdf
    • http://files.stgilespreschool.org/uploads/1/3/1/6
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/53737245560.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/3075238441.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/97657720114.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/pefuwezutanajibadedokit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8696/files/toruzajefogavifubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3280/5527/files/48395062304.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/29899614098.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/38616007471.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1491/files/segexepirozatinojanus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/zosezobezunalibimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/pesanofoxinolix.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_off00006bd0.bin
25abf61b5d03dcb8e6db050444439bbeb9792e040338197f171a0dc27b84958f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD0 4848 bytes
font_01_sfnt_off00007c44.bin
7d4bdf587f25789d1c18d5b15c393e34ce4b539267968111000caa127d0bd3f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C44 10020 bytes