Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3790f207e3a7b86…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 15:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d090e9f24e76f02f3df1ed8bbf6ae5d1 SHA-1: e61225da8c5be1a4f34b65cbd9bdc80e71b75d49 SHA-256: f3790f207e3a7b86e3855206c234d7631e4a5211c437cccfb02e43d9a1bba7b2
152 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with one URL specifically identified as a malicious redirector. The primary malicious link, 'https://ttraff.cc/pify?keyword=bodybuilding+mass+program+pdf', is designed to lead users to further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=bodybuilding+mass+program+pdf
    • http://files.millcreekpartnership.net/uploads/1/3/1/4/131438211/e36554f.pdf
    • http://files.propellertherapy.com/uploads/1/3/0/8/130814466/4855845.pdf
    • http://files.renewstarserpentine.com/uploads/1/3/0/8/130873771/wuxarurubulika.pdf
    • http://files.mamastruggles.org/uploads/1/3/2/6/132683328/jufuliwuvesowisamidu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0078/9154/files/forgotten_realms_interactive_atlas_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9818/files/kamejikudupame.pdf
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/83861151658.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/perofamojixirokelaguted.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/79409316859.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/40525375774.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/bl2_storm_front.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/36034810445.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/66376811366.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/31871203471.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_off0000680c.bin
113d231ab3435db3837c354189aa98f5ec3cebf3843c77464626ef001b434f23
pdf-font-stream PDF embedded font (sfnt) at offset 0x680C 5652 bytes
font_01_sfnt_off00007b35.bin
a381e64b4e010a8665d9bbe6098053fda22b36b09f37ff53f05e4a7e19034570
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B35 9820 bytes