Malicious PDF — malware analysis report

Static analysis result for SHA-256 0558e071dad938eb…

MALICIOUS

PDF

42.9 KB Created: 2020-08-13 03:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867ae2b80114342f98c125acfd4b6a5f SHA-1: 4bedef731f4b327d1b46bd28a979761c3f93e82e SHA-256: 0558e071dad938eb054178729f3a0e9757dc00e12121eeac5a4631269d6f89ed
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector, suggesting a link farm or phishing attempt. The presence of urgency language further supports a malicious intent to trick the user into clicking the provided links. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/wb?keyword=histamina%20en%20harina%20de%20pescado%20pdf
    • http://lakuw.marianwilde.com/uploads/1/3/0/9/130969472/baferesitesero.pdf
    • http://files.globaltakeoverfx.com/uploads/1/3/1/4/131452935/4031279.pdf
    • http://nedasizu.seanwebsterillustration.com/uploads/1/3/1/3/131379591/zomopejamo.pdf
    • http://files.cgsource.net/uploads/1/3/2/7/132740234/vonezorelukir_kariwa_bawijirumuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/tibofepogib.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/beposamovorur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/netorowefijof.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/multiplying_matrices_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/21194763015.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/gemineni.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/21074284110.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/python_plot_histogram.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/dafotiluw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/19358945525.pdf
    • https://cdn.shopify.com/s/files/1/0448/4779/2288/files/bharti_axa_insurance_policy_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/101_science_experiments_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/58337187166.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f23.bin
b2adab3f01fba08f951d1e559a64cc1495f32e7d564b539248149fcfa014eaa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5324 bytes
font_01_sfnt_off000070fe.bin
c250c176f969ae3e7e2d1e972f7e38861d8aab89eed95f00b4f3d9e07a050b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 14380 bytes

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