Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3e95c2d5969292…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 03:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27179ef64b7398373ed1e94a6866ed98 SHA-1: dd96726004ae7aa78e7cabd90da95a7e0615ff30 SHA-256: ed3e95c2d59692924613bf2ea92353a7c4980b877e4ff1b71c0ce7d22a1a95d6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to 'ethical dilemma scenarios'. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a malicious site for further exploitation or phishing.

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=ethical+dilemma+scenarios+pdf
    • http://files.afsthreekeys.com/uploads/1/3/1/3/131398059/4064872.pdf
    • http://files.paulinepeelconsulting.com/uploads/1/3/0/7/130776775/jimatidu.pdf
    • http://files.projectdaretodream.com/uploads/1/3/1/3/131379266/pisorif_miguk_majumu_devepawi.pdf
    • http://files.kimmiyama.com/uploads/1/3/2/6/132681829/dalusokiputowunufezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/fizzbuzz_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/pazupuda.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/31700065369.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/15132951117.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/61396734571.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/31414017901.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/93755686568.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/arabic_language_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25618010541.pdf
    • https://cdn.shopify.com/s/files/1/0433/5291/6119/files/dr_farhang_holakoyee_archive.pdf
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/69224997184.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_off00006994.bin
b41b9c6a62864ebb3ec76a60a0a99f56f87c36ae06d65a4de4cd21ad0908c5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6994 5352 bytes
font_01_sfnt_off00007b9b.bin
0cfd15cc01c264b032e492c8ceb867f45470986553aaa779040fc06da7703c31
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 9960 bytes