Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6f5ba0030a85a8…

MALICIOUS

PDF

41.3 KB Created: 2020-09-05 19:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daf546a90bc7710511e1947f3d42084d SHA-1: cde81df103ec13e2ecca4d1961a3fef73b579cbf SHA-256: 9e6f5ba0030a85a8efc25a9ca0746ea4b5ea2199918cad4361874bcccd8d8fbc
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'screening mammogram guidelines 2019' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a malicious intent to redirect the user to a harmful destination.

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.me/pify?keyword=screening+mammogram+guidelines+2019
    • https://static.usrfiles.com/ugd/111c46_e89824d3ce93432c842ddc411a00520f.pdf
    • https://static.usrfiles.com/ugd/2f8cea_63e7f15959174496b43af891c1d9ce28.pdf
    • https://static.usrfiles.com/ugd/08e331_d9e1662513ae474586758f0456640a05.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/90444496404.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/xitonewas.pdf
    • https://cdn.shopify.com/s/files/1/0432/5218/7298/files/waalaikumsalam_short_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/functional_foods_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/kogimubapemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/feliturezesujezafavowuzad.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/youtube_to_mp4_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/bikokisevabinelitexebowuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/ruxemedetutaxula.pdf
    • https://cdn.shopify.com/s/files/1/0443/5096/3868/files/29353872651.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/94156510252.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_off0000607a.bin
2013ddb5f6c7e991fa3422666cd758ab666579f32557e0f741f128b2aaa61f7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 5844 bytes
font_01_sfnt_off0000743f.bin
1f06b7ec3204586f969df541dce1ddb323b3281d289842669e0999f780ac9d37
pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 10992 bytes