Malicious PDF — malware analysis report

Static analysis result for SHA-256 e805fc294b278c84…

MALICIOUS

PDF

44.6 KB Created: 2020-07-28 19:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de37ed57a8cb9b67d804b2e02a4a605 SHA-1: 7abd9f2fe94e9d2de1368b3dbd8b8c5a09d778ba SHA-256: e805fc294b278c84bc200507ea9bf4e069bdc5e3161ce816a775532bfc64d61f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. This, combined with a PDF link farm heuristic, indicates a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'Google docs template calendar', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious.

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=google+docs+template+calendar
    • http://files.lasalletravel.ca/uploads/1/3/1/4/131437225/9753199.pdf
    • http://files.nwc-umutima.org/uploads/1/3/1/4/131406629/6625503.pdf
    • http://files.thevillamaria.com/uploads/1/3/2/7/132710756/toxuwan.pdf
    • http://files.stalbansepiscopalhouston.org/uploads/1/3/1/4/131453784/1a11bb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/famela.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/87342625304.pdf
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/31333252308.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/92463011739.pdf
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/55211844315.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/40331832548.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/62400665307.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nijepuwujasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4001/files/soregital.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/lekefarenipigiwugegipim.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/lerurusejejag.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e0.bin
b885d16c8a1bac8257f461b607e2387c64d0aa1d20bc4f2cd722db3365fc6cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 5164 bytes
font_01_sfnt_off00008354.bin
d2057045cdc58c5629bc6e499cb3637568f3755258e5d361a2e36491c6e1dd20
pdf-font-stream PDF embedded font (sfnt) at offset 0x8354 10132 bytes