Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dc1ea1d8478def…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 16:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 161cf0740de63321343dfddb474a26d2 SHA-1: 6816623627aca4b08aca0d70acd84ad56b4ee988 SHA-256: 47dc1ea1d8478def6bbbaa6c18e010c1651ee0cd908fb35c04dba8576acc4d86
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=access+control+system+architecture+pdf, which is a primary indicator of malicious intent. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, including one pointing to cdn.shopify.com, likely used to obscure the final malicious 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.com/pify?keyword=access+control+system+architecture+pdf
    • http://files.openmindfitness.com/uploads/1/3/1/8/131856277/1050728.pdf
    • http://zuxela.newbirthmexicanmission.org/uploads/1/3/2/7/132712615/tafapogag-zidopuxatesa-mopaxozugotawo-futelorelamek.pdf
    • http://files.harmonyhypnosiscenter.com/uploads/1/3/0/7/130738779/4399582.pdf
    • http://files.lhsperformingarts.com/uploads/1/3/2/6/132682327/5639969.pdf
    • http://files.induologue.com/uploads/1/3/0/7/130739142/lekekeredo_fibuxiginamel_kovilinutosif.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/que_es_ansiedad_generalizada.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/latch_disclosure_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/2597210545.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/62160561109.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/allahabad_university_ba_economics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4402/files/52926055228.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/nic_network_interface_card.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/negogole.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/20983538524.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1472/files/free_trade_area.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/sizozafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39086675177.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_off00006c28.bin
75b46af9a4d086683a083e743881467af63366e371b6623415412404d59f90ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 5484 bytes
font_01_sfnt_off00007eaf.bin
c4031abbff96b54f96c874e3a2852040497f9996ddfa28654a23af72dfa9737a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF 10328 bytes

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