Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ed0c43f70a26c5…

MALICIOUS

PDF

54.5 KB Created: 2020-08-10 10:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df954f5d96ea5ce6862cf965e3e1e082 SHA-1: 1350a9edf1efc1fa2b64997dc4335c96f890c68f SHA-256: 47ed0c43f70a26c5649bd868c33e582c1bf33adf61af4fc88dcb31af5d31b609
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious component. 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=palabras+agudas+esdrujulas+y+graves+pdf
    • http://ripida.myturfdom.net/uploads/1/3/0/8/130874359/189018.pdf
    • http://files.amymcmahonbooks.com/uploads/1/3/1/3/131379384/4806603.pdf
    • http://files.tealiciously.co.uk/uploads/1/3/0/9/130969352/vivoj.pdf
    • http://files.titanwrestlinginstitute.com/uploads/1/3/1/4/131437418/direrad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/blitzer_intermediate_algebra_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5512/files/42007807341.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/86308039712.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/9745525399.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/fusionner_doc_creator.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/14271518994.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/financial_accounting_libby_7th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/ffxiv_shadowbringers_ost.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/pukazes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da6.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA6 6440 bytes
font_01_sfnt_off00007d9a.bin
6f8eaf108fbf323ab423a4da7a3358f4de3d6f4b2438991c499f26740f8ecb50
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9A 5588 bytes
font_02_sfnt_off000090b4.bin
51074fba73eb1f6771db0de548cdee6a6dbc018c93e18a50883d1a320be705bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B4 11464 bytes
font_03_sfnt_off0000b62d.bin
1398bbf2dfd9cae4409d1d8ab67a79f495e147aa07cce54436be1c2862721d78
pdf-font-stream PDF embedded font (sfnt) at offset 0xB62D 16064 bytes